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Any problems with saltwater wish list?

I have 40 gallon saltwater tank with live rock, live sand, 96 watt light and power head( 400 GPH) with Diamond spot goby and i want the folowing .. any problems???

Cleaner wrasse

Long nose hawkish

Flame angel fish

One false clown fish

Anemone

Corals- not alot but a few corals

i have one already its set up i have a couple large peices of live rock in there with one horse shoe crab about 2 inchs, and one diamond spot goby which is taking pellet food .... i have a heater, bio wheel filter and a new magnet power head (Koralia) that has a flow rate of 400 GPH, 1500 L/H .. is that good? do i need another power head? and i have a couple of snails the goby is a GREAT sand sifter. o and i have some brown algea thats forming so i got about 15 snails and i have a 96 watt light...