Boyd Chemiclean 2g Treats up to 300 Gallons - Effective Cyanobacteria Chemi-Clean for Marine & Freshwater Aquariums, Safe for Fish, Corals & Invertebrates

Great product!!!works well just one day for my marine tank. ALL of the red algae were gone, and the tank looks clear and does not harm the fish..just follow the i tructions...highly recommended

I had been fighting blackish/red slime in my tank for months. I bought this and followed the package directions exactly. After 48 hours there was still slime in the bottom of the tank, but I vacuumed it out and did a 20% water change. Two weeks later and it is still clean! Great product! And my saltwater fish were fine. Before and after photos.

PROS:* Works. As promised. Full stop.CONS:* None that I can identify.USE:Directions are fine (for me). But perhaps they could redesign them to make more prominent the first step since it appears many people have problems understanding that they need to increase aeration during treatment.I purchased ChemiClean as part of a bundle of disaster-preparedness supplies.Phase 1 was managing out-of-control parameters, feeding practices, and manual removal. My parameters weren't fluctuating and were relatively stable during the outbreak period. But that didn't seem to bother the cyano. However, I went to the effort of standard practices of stabilizing water chemistry (all parameters measured within acceptable ranges and held stable), water cleanliness (regular water changes), cut down feeding as well as changing foods. I even manually removed some of the cyanos. I bought vacuums to do this. They didn't work too well due to the gravel size (Caribsea Arag-Alive Special Grade).After a few weeks, I decided to move to phase 2 and try bacterial supplements. I tried dosing Brightwell Aquatic's Microbacter7 as well as Dr. Tim's Waste-Away. I did this for a month according to dosing directions. They didn't make much of a difference at all.Phase 3 was Chemi-Clean. I enabled the aerator schedule to full-time duty around the clock. I removed carbon. After a few hours, I dosed about 1/2 of recommended dosage of Chemi-Clean. In 24 hours the cyano was nearly gone. In 36 hours there was not a trace of it anywhere (visibly). It's been clear of cyano for weeks. I've kept the adjusted feeding cycle and feed types. And reverted the aeration schedule to original programming. I've returned the carbon.It works.While I always prefer natural remedies and trust time and improved husbandry, sometimes you need a little extra muscle to fix an issue. Chemi-Clean worked great and I didn't observe any negative side effects on any of the corals or inhabitants in my tank. To name a few:* Euphyllia glabrescens* Sarcophyton* Zoanthids assorted* Palythoas assorted* Goniopora teal/green and ORA red* Duncanopsammia* Caulastrea* Montipora Digitata* Rhodactis assorted* Ricordia assorted* Discosoma assorted* Stichodactyla tapetum (anemone)* Sand sifting starfish* Clownfish* Six line wrasse* Lawnmower blenny* Green chromies* Peppermint shrimp* Skunk shrimp* Emerald crab* Blue leg hermit crabs* Flame scallop* Turbo snail* Astrae snail* Mandarin dragonet

Really works good product

Powerful stuff, worked as advertised for my cyano outbreak, wow.

Follow directions and this stuff works like a champ! It cleared my red algae problem up just a few days.

Great stuff! Cleans cano like nobody's business. Doesn't harm fish. And this was way cheaper on Amazon then in the pet store. Easy to mix. Does have a strong odor. But does the jobWill be ordering more....this is the only stuff I've found that completely gets rid of Cano and I've been a fish keeper for 10 years.

not a perfect solution but will help reduce cyano. two day black out made more of a difference with the second treatment.