Join Date: Aug 2010
Location: Central Virginia
We like exact params around here so we can get a feel for the tank. So can you please test GH, KH, pH and temp for us? Can you also test your ammonia, nitrite and nitrate please?
Is this a newly set-up tank? If so, how did you cycle it?
Have you actually accounted for everyone to be sure they're not dead? Pick up the cholla and take it out of the water, they should rain out if they're still alive but just hiding.
Since you're using RO, what are you using to remineralize it?
I'm a bit confused about your filter cleaning regimen. You clean the actual sponge filter one week and you clean the pre-filter the next? If so, you're killing your cycle. You're rinsing away half of your beneficial bacteria every week.