The cyano struggle has been a long one. I have been trying to up the flow and clean the sandbed to take away whatever it was feeding on even though my nutrients are always low. I have been using 2 products from KZ wich seems to have knocked out the cyano. This last weekend i deep cleaned the sump and got a lot of detritus out. I was super excited to get the junk out that may have been feeding the cyano until yesterday. Yesterday I came home to stringy brown dinos on my sand and GSP. Uhg. I think I may have to put an auto feeder on this tank and run the skimmer only half the day to keep nutrients up. I dont know where the nutrients are going. I dont run macro anymore and I have 7 fish in a 20 gallon tank. I guess my corals are using it because their is no visible algae. This tank is making me earn my hobby.