Well I bought A filter/powerhead from petsmart. And it came with sponge filter. I took it out because it lower the flow from the power headattached to it. I bought some biostone, to promote nitrate, and nitrite organisms to grow on The biostone in the filter. But I'm going to buy one more to stick on The other side of the tank. And replace the fake plant with live rock, and some cheateo plant. Oh it also has a carbon pack right before the power head. But with what I Have and an airstone in it to create some flow in the tank. All levels are zero. Ph is 7.9, sg is 1.002. Which is a little high right now but he had some white stuff on his eye. And because he is soft skin I couldn't really use anything but saltwater.