Overloading?

[MightyMike1]

How can I know when my tank is getting overloaded? I currently have:
2 anemones
1 yellow tang (4 inch.)
1 maroon clown (2inch)
2 damels(1inch)
1 anemone crab
1 cleaner shrimp
also a bunch of soft coral that grew everywhere

In a 30 gal tank. My amonia levels are a bit high at .25 right now because I just added the damsels a week ago. I was wondering if I can add a coral beauty angelfish without overloading? Are coral beauty's even reef compatable? Ive heard several different opinions. One last questions would be that when invertabrets such as crabs and shrimp shead their shell should I remove it from the tank?

 

[MightyMike1]

picture of the tank

 

[DaisyPolyp]

you're definately reaching the upper limits for the size of tank, but other factors will play into it as well: how many # of live rock? How deep is your sand bed? What type of filtration do you run?

IMO 30gal is a bit small for a tang. I would say the same for the coral beauty unless maybe it is one of the dwarf varieties.

also, you should leave the old shell in the tank as it contains important minerals that need to remain in the closed system. The shrimp itself, or other inverts will eat the shell.

 

[Baianotang]

I've got an easy solution ... Get a bigger tank.

 

[Baianotang]

And sump.