Macroalgae
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Macroalgae for Sale
Macroalgae are large, multicellular algae used in refugiums, display tanks, and nutrient export systems in saltwater aquariums. On Light Fish you'll find macroalgae listed by reef hobbyists and cultivators, including chaeto (Chaetomorpha), caulerpa, gracilaria, halimeda, and various other species. In a refugium, fast-growing macroalgae like chaeto actively export nitrates and phosphates from the system as they grow, helping to maintain stable water quality in the display tank.
All macroalgae orders on Light Fish are backed by a platform-wide Live Arrival Guarantee and shipped in sealed, moisture-retaining packaging via priority or overnight carrier with weather monitoring. When adding macroalgae to a refugium, provide appropriate light spectrum and intensity — refugium-specific LED fixtures on an alternating light cycle with the display tank help stabilize pH around the clock. Harvest regularly to maintain active nutrient export.
What buyers say
4.8 out of 5 from 117 reviews on real orders
“This seller's customer service is excellent. I ordered 6 Santa Claus Guppy fry and received 7 active healthy fry along with a free freshwater plant. Package arrived fast and was well insulated and well packed.”
Joshua L., FL
Bought Santa Clause Guppies Bag Of 6 Fry
“The ahrimp arrived alive and healthy, and they came really well packaged for safety. It's a nice mix of males and females. Very happy with my order and would definitely order from this seller again!”
Jennifer A., Ohio
Bought 20+1 Red Cherry Shrimp/ Neocaridina Red Shrimp/ Live Freshwater Shrim.
“Well packed, great communication, fast shipping. Fish were healthy and adapted easily.”
Jessica P., MD
Bought Midnight Blue Galaxy Guppy (1 Trio) + 1 Pair Doa
“Love my new snails! Seller gave a good assortment of size and color. I especially like the pink snails as they are a very pretty, unique color. The well-packaged snail container came quickly via UPS without incident. As…”
Sarah M., WI
Bought 25+ Ramshorn Snails (Pink, Blue, Red, Leopard) + Free Floating Plants
“I received a beautiful, complex, small knot of spider wood that looks stunning from multiple angles. Timely shipping, well packaged with no broken pieces. For this price I definitely feel like a winner, no complaints…”
Katherine S., MI
Bought Spider Wood Driftwood (4x6")
“All 11 were bright eyed and bushytailed right out of the box! Swimming like crazy in their travel bag just aching to be released! So after 30 minutes of acclimation, that's just what I did. Now they're lost somewhere…”
Patrick G., WA
Bought 10 (+1 Free) Ocean Blue High Grade Neocaridina Dwarf Shrimp