D&DRowahos Phosphate Remover for Aquarium, 1000ml

I've had problems with my phosphate for years, and tried all sorts of additives from redsea, seachem et al. This one really works. I've been using it for two months now, and my phosphate levels have dropped from over 0.08 down to 0.03. Will certainly be a repeat buy.

This product is a default for marine aquarists and you can safely leave it in situ in the filter stack as it won’t release phosphates back in your water. I have used it for many years and it seems to be the most reliable media for phosphate reduction. Don’t expect a huge reduction overnight, but do expect your levels to reduce steadily and to make a difference to algae growth rate, especially if it’s nuisance algae.The downside of using this is that it can be messy! I put it into a very fine mesh bag and place it into an internal filter stack so that the water flows through it and change it all once every other month. When new, it chucks brown coloured water into the tank, but this quickly dissipates. As with all chemicals, follow the dosing instructions and make sure that water changes are carried out before use and during use.

Lower phosphate for about 4weeks though can clog your reactor personally I found aqua forest phosphate minus a lot better though still only lasted 4 weeks a refugium is the best bet in a sump

Brought my phosphates down over night. Recommend putting this into a tank right at the start before phosphates build up in rock and sand. Bought this for a marine tank and sits in the rear compartment in between my mechanical filters. Clouds the water quite a bit when you first put it into the tank, but it'll clear within a few hours.Phosphates were constantly at 0.5 even with water changes and now it sits at 0 and has remained like that for weeks.I use this without a phosphate reactor - just put it into the media bag that comes supplied.

Very good phosphate remover. Shame only the 2 smaller sizes come with bags!

Works really well on my marine set up readings dropped really quickly

I use this to keep the phosphate levels down in my tropical aquarium. I simply stick it all in the supplied bag (a simple nylon sock) and shove it in my Eheim external canister filter where it does its stuff for months.I dock it a star because it's darned expensive for a tub of rust.

Put in to clear phosphate & silicates to combat brown diatoms. Have so far used for a week, putting it inside filter canister, inside the sponge. Have changed every 48 hrs , now leaving for 72 hrs and changing & so far no brown algae!!!!Seems to do exactly as promised, for me will last quite a long time as my tank is only 10 gallons so has small filter canisters, again for me has been worth every penny!!!!