Vaughn thanks so much for helping me. It's hard to catch on to this high tech system - there is so much to watch and understand!

My drop checker is with the 4dKH. My plants are not that full. There is plenty of circulation. I have read the threads here about that and seen pxs of the tanks. I think maybe I just had the ferts out of balance.

I checked the Ammonia again and it is 0. I wish I knew what was going on with my plecos. They were in such distress. I surely don't want to repeat that again. I ended up loosing a white spot and a queen arabesque. Not cheap! I had had them for about 2 years.

I feel like I need a UV filter in case there is some weird pathogen in the tank that is affecting them. I had recently gotten some fish at a LFS of which every single one of them died (and no I didn't quarantine, shame on me). I have been looking at the Coral Life Turbo Twist and the Aquamedic Helix Max 36 Watt. I don't know which to get. Does anyone know which is better?