Ok, Dave! I figured it out and man am I pi**ed!
When I spoke with the city water foreman, he mentioned they are putting ammonia and chlorine in the water which forms chloramines. So what that means is that when I use Seachem Prime, it breaks the bond between the chlorine and ammonia. Its not the ammonia or actually it becomes ammonium (nontoxic form of ammonia) that Im worried about, its the nitrites and especailly now that Im doing 70-80% waterchanges, it puts a huge load on my bio. I noticed yesterday that the discus when breathing heavier than normal and tested nitrites right away. Under 0.3ppm and when I did a 90% water change and tested nitrites right after, got a 0.1ppm measurement. This morning, nitrites back up to 0.3ppm. I did a 20% water change, removed some established media from my 90G and placed it in the 30G filter. This is just great but you know what, I kind of knew this was going to happen. Why? Because I was trying to cycle my 10G and when it was complete, I did a 80% water change. Then filled with tapwater, treated for chloramines and got ammonia reading (actually ammonium), then nitrites all over again. Really sucks!
Btw, after I did the 90% water change, half hour later the discus were all happy, breathing normal. I also fed them evening snacke and were not very frigthened. This morning, frightened. Grrrrr! >
I wish there was a way to remove chloramines with no side affects. I guess I could setup a filter just for the barrel.
Any suggestions?