OtherNot specified
Mini Valve with Double Hook 4/7
A small plastic check valve with double hook for 4/7 mm hose (1/4 inch hose, or inner diameter 4-5 mm hose), green.
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Other
FilterBubble Magus
MiniQ Nano Internal Protein Skimmer
The Bubble Magus MiniQ is a compact internal protein skimmer for nano aquariums up to 20 gallons, with a drop-in design for AIO or sumpless tanks. It uses a 2W needle-wheel pump powered by USB and includes a bubble diffuser, air silencer, and water adjustment valve.
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LightsGiesemann
MINOX marine LED Aquarium Light Fixture (Black) Aquaristic
The Giesemann MINOX marine LED Aquarium Light Fixture (Black) is a 55W full-spectrum LED puck with 7 LED colors, Diamond Prism optics for uniform coverage up to 24 x 24 in, silent passive cooling, and IP54 splash-proof aluminum housing, controllable with an optional LED controller.
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LightsGiesemann
MINOX tropic LED Aquarium Light Fixture (Black) Aquaristic
The Giesemann MINOX tropic LED Aquarium Light Fixture (Black) is a premium 45W LED light designed for freshwater planted aquariums. It uses 98 high-efficiency LEDs in a full-spectrum RGBW configuration with Diamond Prism optics for even, glare-free illumination, and it is controllable with a Giesemann LED controller (sold separately).
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OtherEcosystem Aquarium
Miracle Mud Refugium Media
EcoSystem Aquarium's Miracle Mud is a deep-water oceanic mud blended with minerals and trace elements, serving as a refugium substrate that supports aerobic and anaerobic biofiltration, macroalgae growth, and replenishment of trace elements in reef aquariums.
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FilterNot specified
Mix Bed Deionization DI Resin Refill 5 Liter Bag
High-capacity mixed-bed deionization resin refill (5-liter bag) for RO/DI water purification systems; removes dissolved impurities remaining after reverse osmosis to produce ultra-pure 0 TDS water. Helps eliminate silicates, nitrates, phosphates, and heavy metals; color-changing resin for easy replacement monitoring; suitable for all standard refillable DI cartridges; ideal for reef, marine, freshwater, and pond systems.
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OtherTwo Little Fishies
Mixed Flakes 30g Sea Veggies
Two Little Fishies SeaVeggies mixed flakes (30 g) contain only seaweed, no fillers, a great natural choice to provide the nutrition your fish need to remain healthy, colorful, grow, and reproduce. Intended for herbivores such as tangs and surgeonfish, angelfish, moorish idols, parrotfish, large butterflyfish, cichlids and goldfish.
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OtherVivid Creative Aquatics
MJC-SC Crevice Vacuum Tool
The Vivid Creative Aquatics MJC-SC Crevice Vacuum Tool turns small pumps (Marineland Maxi-Jet 600/1200, Sicce Syncra Nano with included snap-in adapter, Eheim CompactON 300) into a compact aquarium vacuum with a narrow tip for pulling detritus from tight corners and behind rockwork. It connects to any pump with a 3/4" slip input or tubing, with output routed to a bucket or a fine micron filter sock, and is printed in reef-safe PETG plastic.
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OtherVivid Creative Aquatics
MJV-SC Vacuum Attachment
The Vivid Creative Aquatics MJV-SC Vacuum Attachment turns a Sicce Syncra Nano or Marineland MaxiJet pump into an aquarium cleaning vacuum for removing detritus from bare-bottom tanks and sumps. It concentrates intake flow for effective cleaning and includes a removable debris screen to protect the pump.
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Wave GenerationJebao
MLW-10 Wifi wavemaker
The Jebao MLW-10 Smart Wave Maker is a WiFi wavemaker for saltwater tanks with magnetic base. Controllable via the Jebao app over WiFi or manual LCD controller; sine wave technology for ultra-quiet, stable performance; no exposed copper elements for marine and freshwater; super-quiet motor with max flow 4000 L/H (1065 GPH); 24V, 10W; pump only 1.5 x 2.25 in dia.
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OtherModern Reef
Modern Reef - Complete Reef Food 100ml
Modern Reef Complete Reef Food (100 ml) is a complete reef food for all modern reef aquarium inhabitants like micro-organisms, symbiotic bacteria, filter feeders, and corals, directly and indirectly. Improves vitality and immune system; boosts coral growth and coloration; contains liquid and solid food, amino acids, vitamins, fatty acids, and micronutrients by proportion; helps fix the cause of the 'Greening Effect' for better yellow/orange pigments; designed for use with the Proportional Consumption RKS.
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OtherModern Reef
Modern Reef - ICP (1 Reef Water Analysis + 1 RO/DI Analysis) 1-pack
Modern Reef ICP Duo 1-pack includes 1 reef water analysis plus 1 RO/DI water analysis: 56 parameters for reef water and 49 essential parameters for RO/DI water. Uses ICP-OES/MS, chromatography, and AI Analyst quality control with 24-hour results; intelligent online system delivers personalized correction dosages and anomaly management.
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OtherModern Reef
Modern Reef - Polypop 100ml
Modern Reef Polypop (100 ml) is designed especially for SPS polyp coloration, maximum extension, and coral pigmentation, complementing Complete Reef Food and the proportional consumption reef-keeping system. It induces maximal polyp extension and assists pigmentation, especially on SPS coral polyps, boosts yellow/orange pigment excitation, strengthens coral immune system against pests and diseases, and induces faster base creation on new Acropora frags. Dose during daytime when lights are on; nutrients must be detectable (PO4 +/-0.03-0.04 mg/L).
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OtherModern Reef
Modern Reef - Reef Water Analysis Pro (1 Reef Water Analysis)
Modern Reef Reef Water Analysis Pro (1 reef water analysis) tests up to 56 parameters, including KH, high-resolution salinity, nutrients, pollutants, and water clarity, using ICP-OES/MS and chromatography in dual state-of-the-art laboratories with AI Analyst quality control. Results within 24 hours; online system provides personalized correction dosages, maintenance guidance, and anomaly task management.
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OtherAvidAqua
ModMag Giga
The AvidAqua ModMag Giga is a rust-free, ultrasonically double-sealed modular magnet set for securely mounting frag racks, probe holders, and accessories on glass or acrylic up to 3/4-inch thick.
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OtherAvidAqua
ModMag Mega
The ModMag Mega is a modular aquarium magnet set from AvidAqua for attaching accessories inside and outside the tank. Its ultrasonically welded, double-sealed construction is rust-free, includes a shake test to verify the seal, and works on glass or acrylic up to 1/2 inch thick.
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OtherLoc-Line
Modular Hose Segments
Loc-Line Modular Hose Segments are flexible modular plumbing for endless plumbing configurations, commonly used on return lines and closed loops where directing water flow matters. Six segments of 1/2 inch hose measures 5.5 inches and six segments of 3/4 inch hose measures 6 inches; segments snap-fit together and can be cut or joined to any length. Black, push-connect articulated construction.
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Substrates & AquascapingUltum Nature Systems
Mopani Wood
Mopani Wood is an African hardwood famous for its extreme density and striking two-toned contrast of sandy tan and deep chocolate brown. Because it is so dense, it typically sinks immediately, and its exceptional hardness means it breaks down much more slowly than other driftwoods for a long-lasting hardscape foundation.
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OtherNeptune Systems
MOS Magnetic Optical Sensor
The Neptune Systems MOS (Magnetic Optical Sensor) is a compact waterproof optical water-level sensor that plugs into an Apex FMM port and uses reflected infrared light to signal wet/dry state changes. It is used for building auto-top-off systems, high-level sump warnings, and reservoir level monitoring, and mounts magnetically on glass or acrylic up to 1/2" thick.
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OtherISTA
Moss Cultivation Pad
The ISTA Moss Cultivation Pad is a high-grade ceramic pad (available in 2" round, 2.5" square, and 3" square) that holds moss in place with a stainless steel mesh net and corner hooks, giving freshwater aquarium moss a stable foundation to grow on without tying it to hardscape.
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Substrates & AquascapingUltum Nature Systems
Mountain Stone
Mountain Stone is a relatively new addition to the world of aquarium hardscaping, offering a unique blend of characteristics from some of the most popular stones in the hobby. Light in coloration, this natural stone is comparable to Dragon Stone in its warm, earthy tones, yet it is exceptionally lightweight, similar to Lava Rock. Its craggy shapes and almost sand-like textures are a perfect pick for creating dramatic cliffs and high-altitude mountainous scenes. Pairs well with deep green mosses and vibrant red aquatic plants for high contrast. Also suitable for terrariums, paludariums, or similar bioactive enclosures. Sold in 10LB and 20LB packs.
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LightsEHEIM
mounting bracket for powerLED+
The EHEIM mounting bracket for powerLED+ is a dedicated mounting accessory that securely installs EHEIM powerLED+ lighting systems on the aquarium glass rim. It eliminates the need for ceiling suspension or drilling, provides stable and secure support, and allows simple positioning and adjustment of the light over the tank; suitable for freshwater and marine aquariums.
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OtherAvidAqua
MPO Duo - Magnetic Probe Organizer
The AvidAqua MPO Duo is a magnetic two-probe organizer for modern water monitoring systems, holding two standard probes (pH, ORP, salinity, temperature) plus two guide tubes for automated testing systems; it uses double-sealed, rust-free ModMag magnets and a patent-pending Slide-Loc system instead of thumbscrews.
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OtherAvidAqua
MPO Quatro - Magnetic Probe Organizer
The AvidAqua MPO Quatro is a magnetic four-probe organizer for modern water monitoring systems, holding four standard probes (pH, ORP, salinity, temperature) plus two guide tubes for automated testing systems; it uses double-sealed, rust-free ModMag magnets and a patent-pending Slide-Loc system instead of thumbscrews.
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OtherNeptune Systems
MPR Magnetic Probe Rack
A 12-inch tray that holds filter socks in place inside a sump, providing mechanical pre-filtration by trapping suspended particles before water reaches the other filtration stages.
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LightsApogee
MQ-210X Original Underwater Quantum PAR Meter
The Apogee MQ-210X is a handheld underwater quantum PAR meter that measures photosynthetically active radiation for aquarium lighting, with automatic immersion-effect correction for underwater readings. It features a waterproof quantum sensor on a waterproof cable, datalogging with 30-minute averages, and NIST-traceable calibration.
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LightsApogee
MQ-510 Full Spectrum Underwater LED PAR Meter
The Apogee MQ-510 Full Spectrum Underwater LED PAR Meter (Open Box) measures photosynthetically active radiation underwater with an immersion-corrected sensor, covering 389-692 nm with 0-4000 µmol/m2/s resolution and ±5% accuracy.
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LightsApogee
MQ-510 Full Spectrum Underwater LED PAR Meter
The Apogee MQ-510 Full Spectrum Underwater LED PAR Meter measures photosynthetically active radiation underwater with an immersion-corrected sensor, covering 389-692 nm with 0-4000 µmol/m2/s resolution, ±5% accuracy, and a weatherproof self-cleaning housing.
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Substrates & AquascapingBuce Plant
MR Bonding Mortar - Coralline
Marco Rocks Bonding Mortar color-matched to MR rock types in Coralline, a reef-safe mortar for bonding rock work safely and effectively. This 5LB mixing kit includes mortar powder, acrylic polymer liquid, instructions, a mixing spatula, and a bucket. Sets in 20 minutes and fully cures in 24 hours; 100% non-toxic, Triton ICP tested, and suitable for marine and freshwater aquariums.
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Substrates & AquascapingBuce Plant
MR Bonding Mortar - Natural
Marco Rocks Bonding Mortar color-matched to MR rock types in Natural, a reef-safe mortar for bonding rock work safely and effectively. This 5LB mixing kit includes mortar powder, acrylic polymer liquid, instructions, a mixing spatula, and a bucket. Sets in 20 minutes and fully cures in 24 hours; 100% non-toxic, Triton ICP tested, and suitable for marine and freshwater aquariums.
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