I'm new at this so please bear with me.I have a 55 gallon tank with 50 lbs. of LR. Started aquarium in Feb. added LR in March. The last of April added 2 damsels. later moved to another tank.Now in September, in tank,2 Seabae clowns, 2 Ocellaris clownfish,1 Royal Gramma, 1 Lawnmower Blenney, 3...