Hi, new to this site. Ph- 7.8 Ammonia- 0.25 Nitrite- 0.2 Temp-80 degree F cycled over 6 weeks with tetra safe start 10% water change weekly 25% monthly foods; Frozen Brine Shrimp and spectrum Thera every other day. ( one or the other , never together ) 6 barbs ( small ) 3 Black mollies 2 Bala Sharks 2 Algae Eaters No problems with barbs or other fish until noticing one barb loosing its color, the black is faded. The barb's swimming pattern is not normal. it swims quickly up to the top of the water and then he floats for a second as if it just died, then it swims around like normal. Been searching around this forum for this topic but no conclusion. Please help and Thanks in advance. No pictures yet because i need to find the right setting on my camera. ???