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...