I have a 20 gal tall SW Fish Only With Live Rock tank. I have a crushed coral substrate, with 2 baby Ocellaris Clowns, 1 firefish, and 1 Linear Blenny.

Or a snowflake moray eel, people say they need at least 20 gallons. I am planning on getting a flame angel, mated pair of clownfish, royal gramma, firefish and I have two damsels and a brittle star. Me getting these creatures are looking at about 3-4 months. Please tell me if I can do anything to help the situation.
What about starting out with a 3inch horshoe and when he is bigger releasing into the atlantic ocean?

i ave some

I was wondering if Clownfish and Firefish Gobies go well together as I love both types of fish.
I only have experience with fresh and brakish tanks. What are some additional things you must check for with a saltwater tank? Also what additional things must I buy? Also amount of filtration suggestions for a 20 gal?
It will be a 20 gallon tank.
I already have a hydrometer, a heater, and filter.

the male usually swims around and sometimes goes into the burrow as well
they are about fully grow pair.

im lookin to start adding coral to my 75 gal fowlr tank. I have about 110 lbs of live rock, 5" of live sand, a good lighting system and good water circulation.
my only concern is the amount of fish i have.
i have one cardnail fish, 2 firefish, a black percula, a maroon clown, an ocularis clownfish, and a blue damsel that im having trouble catching. is this too many fish for a reef tank?

They’re all pretty small. And I think it’ll be ok.
I’m new to the hobby and.. the fis people said 3 small fish would be OK in a 5 gallon tank. 25 Years of experience, so i’ll trust them >_<
Please.. just tell me if they’ll fight.. not if it’s too small.

My firefish turned up dead last week and he slept in a small hole in a rock. i don’t know how he died but his tail was all torn up. I do have other fish but they are not aggressive towards each other. Then today one of my fish was also floating and his tails are all torn up and he has a popped eye right now. Hopefully he will survive, but is it my crabs that are doing this to him? He sleeps in a seashell …

sry but can these fish
1 maroon clownfish
1 valitini puffer
1 ONE three stripe damselfish
1 firefish goby
1 Sailfin/Algae Blenny
1 auriga butterfly fish
and 1 Jade Filefish???
in a 55 gallon saltwater tank if not whats wrong
what do i need to change