So as it says the tank has cycled and I want peoples opinions on the water changes. Ammonia and nitrites both at zero but nitrates are at 80. Should I do 2 30% water changes or go for one big one. Any thoughts will help. First fish are just going to be 2 clowns. It is a 125 gallon tank. Thank you all. I'm leaning towards 2 smaller water changes over the next couple days. And what nitrate level can the clowns handle. They are hardy but is 20-40 too much for them? Thank you all in advanced.