I gassed my fish. I have a drop checker and have been pretty much perfect with my co2 concentrations up until now. I thought I would increase co2 very slightly yesturday, and when I went into office today to check, I was bright yellow and the fish were all gasping for air at the top of water. 1 dead fish only. The needle valve adjustment I have it horrible. I have marked positions on it, and sometimes the same position will be too much co2, too little, or just right. I dont know if dirt inside causes the problems, but I made the most slight increase and it ended up being way way way too much co2. :mad2:
So, I did a 20% water change, and aimed my powerhead to cause surface water agitation. This willl cause the pH to drop, but had I not done this, 100% of the fish would probably been dead in the morning. lesson learned. I have read many times not to adjust co2, and then not stick around to see the results. I guess I learn best by making my own mistakes.
In other news, I on friday I tossed about 25% of my plants. Tank looks much brighter, but I did not end up doing a bleach dip on the plants, so there is still algae in the tank. I am hoping that having left the plants out of water for an hour or so while I basically tore the whole tank down, will cause the algae on the remaining plants to die off a bit.
I took photos of the massive water change I did, which included cleaning one of the filters after swirling all the eco-complete up and then running both filters for 1/2 without any plants in the tank. This took an amazing amount of mulm and crud out of the tank. I only added this filter a month ago, you will not believe the black oil I found when I opened the eheim up.
Pictures later. I just wanted to post about the gassing of the fish. Dont let this happen to you.
Tank does look better, but there is no way to tell if the tank will just get nasty again, or start to get better.