I will wait another 24hr. Conditioner should be here tomorrow afternoon . the reason why i did a water change is because I saw and felt that the fish were uncomfortable in the tank , I know seachem ammonia alert is reading that is safe , but then why as soon as I drip a fish in the tank , their health deteriorates within minutes , fins start to get red, slime coat start peeling and eyes get white and peel. That only tells me is ammonia burn . I can't explain why nitrates are at 0 alot of you can't think how, I really don't know . I did have some bb at some point , and my few grew healthy and big. I admit it was my fault that this happened , I stated that I buy and sell a lot , so usually I buy small and sell small so it goes into the 75 gallon with growouts, now on the past month I introduced 2 x 18" bass to the tank , I think this is what led to the system crash . I didn't give it time for the tank to go into a cycle to handle the extra bio . when I saw water getting cloudy , I did big water changes 50% twice a week, thinking the tank was dirty . so I kept disturbing the bb blooms , leading to total crash . I can't explain how my arowana, enndli and gara are showing no signs of ammonia burn, aro and endli are as healthy looking as can be, but am sure there is some damage done internally . Now , lets rule out the bad water from fosid , the reason why I say this is once again, I add same water to the 75 and I feed that tank constantly , 3 times a day. 2 x time with carnivore sinking pellets , at night with blood worms and alegea wafers , i overfeed and tank is normal and fish are growing by the minute 1" azuls are 7" in 3 months. I'll dose tank again once tetrasafe start arrives , but then should I not do wc for a certain time after I add the bb ?