Since I've found this forum (couple weeks ago) I've learned TONS. I broke down and bought a test kit. I freaked. I had ammonia .25 and nitrites at 0 and nitrates at 10 and ph at 7.6 (out of the tap ugh). I thought I'd been killing off all my bb and causing harm to my tank. 25% water change as usual, and put some ceramic rings in the filter. Well today I tested the water again (after two days away at work). My tank is only 10 gallons Ammonia 0 Nitrite 0 Nitrate 20 Copper 0 Ph is still 7.6 - not sure if it's harmful to the inverts and fishes or not So my noob move - wait for it. ..... Yea I had added 4 new fishes a month ago. I only had three little fish in the tank before the 4 new ones - guess that can cause a spike in ammonia until the tank catches up to its new overload... What a learning experience! Now to lower the ph and kill off the algae ... That ugly brown algae. Ideas anyone??