8O I set up a 30 gallon marine aquarium 4 weeks ago, got some live rock, 2 Domino Damsel. Everything going well (ish!) Ammonia 0, Nitrite 0 but nitrates still at 30ppm. i'v just added some Kent Nitrate sponge to my canister filter and i know it will take some time to bring down the nitrates but i'm dying to add some mushroom anemones, polup's. Will they be ok with this level of Nitrate of am I just being impatient! I'v kept marines before sucsessfully but this is my first time at a reef tank. What corals would be best to add first? :? Thanks Tony for your reply on my last question 