I change about 15% of the water each week using pure Scottish tap water very few additives arround here. the tanks been set up for seven months and the sump about 5-6 months but the eheims' been running on my previous six foot and my five foot before that, 18 months at leastWolf3101;1423832; said:no they should look and more importiantly smell 'used'
If your bio-load is growing faster than the BB can keep up with then it's possible youve just expieranced a cascade die off. that would account for the ammonia levels...To be honest with you ammonia levels should ALWAYS be unmeasurable at ANY ph. I'd toss out any test kit that gave 'safe' levels of amonia in the aquarium.
