i have kept freshwater fish for 3 years and i decided to go salt water. i have a 55 gallon aquarium with a marineland 400 biowheel filter (i trashed the wheels)and a aquatech 40-60 filter. i have already put in the sand, water,and salt. i used two bags of caribean live sand and one bag of marine life crushed coral. my salt is instant ocean. i will be adding fish in 8 day. any suggestions?