Guys, I have a new set-up (since 5-March 2014) of a sump tank - with Belem grass, and 4 x Ottos. After the tank was cycled - 31-Mar-14, I began the planting of Belem Hair Grass, and introduced the Ottos into the tank. I have a UV steriliser, Co2 inline and enough filter media in the sump to keep the junk out. However - my water is cloudy and not at all clear. I have been doing this for years - over 20 years, and I cannot remember such an issue. The tank is pearling, and all is well - however I cannot get the water clear at all. I am fertilising using ADA ferts, daily - and water changes weekly. The only change I saw - when I introduced, with a lot of hesitation - API Accu Clear. Cleared the water for 1 x day. I am at a loss - anyone with experience - as to when to make drastic changes - or - wait it out - how long? Soil is the ADA Power Sand and Aqua Soil. I know there has been a lot said about the cloudy water, but nothing seems to work for me.. Over to the experts and thanks in advance. I will post updates - to this issue - as things change to the tank. I do not have any external filtration canisters, it is all SUMP filtration.