I like the idea of waste control since I have a African Cichlid who is very messy. I honestly haven’t noticed a difference but that could have been due to my filter being old. I have a new filter and will update to see if I notice a difference in waste control.Very easy to use. I have a 75 gallon fresh water tank and three 11” plecos and one 12” gold dojo loach, along with other fish. Waste builds up quickly. I can do water changes monthly when I use this product half way through the month. Water will clear up within 24 hrs and nitrate levels will return to normal. Worth using and reduces amount of manual tank cleaning.We have an aquarium with a very large, very dirty pleco. It's so hard to keep the water clean. The pic I uploaded is a before and after, about an hour between each one.I'm absolutely floored at how well this stuff worksGood stuffIt works okay!!I have used so many products a pet store, this one works, have been using for over a year, I have 60 gallon fish tank, it does the job in 10 hours, love it. Thank youBetween this and some serious water changes able to clean out about 95% of all crud with the rest slowly deteriorating to the point that no sludge is seen anywhere in my tanks.Edit: Not happy with the price increase on this product. I decided to increase the frequency I get of this as I have two very large tanks to upkeep. In the future pricing pending I may consider to purchase semi-monthly.Excelente producto; lo uso una vez por semana.The only reason this isn't getting 5 stars across the board is that because when I got it it says in the small print on the back of the bottle thst if you don't use it with another fluval product it can cause an ammonia spike. I then had to go and buy the red bottle too. I don't mind having to use both products but it would be useful to have been told this in the item description. Good job I read the small print of I could have killed my fish. I've been using it for 2 weeks now and am starting to see a small difference in the substrate.Love this. My aquarium now has crystal clear water. I didn’t take a before photo, didn’t think it would make such a difference. Following a significant water refresh (took some out, topped up with fresh, a filter change and this solution added. Photo attached. This is the clearest it’s ever been! Thank you!After a disaster and having to buy a new set up and a brand new filter I was struggling with amonia spike constantly I was having to do water changes twice a day I put this in and with a couple of hours the amonia was dropping. Great fluval quality as always these are the only products I will place in my tank. I have very sensitive fish especially my young clown loaches and they have handled this perfectly. Also worth having some in incase the filter goes wrong!I bought this as I lost my mature filter media (my own fault) and ended up with new tank syndrome. The water went cloudy and my ammonia levels were high. It didn't clear the milky mistyness. I'm not sure if it helped at all in my situation but I can see from other reviews it has other uses for cleaning. I ended up doing small water changes every day and adding a zeolite rock which seemed to show results.Easy to use and can extend the time till the next fish tank cleaning which is useful if going on a 2 or 3 week holiday.