Help loss of life

[dhrone]

Amon - 0
Nitrite - 0
Nitrate - 15
Sal - 1.025
20-25 lbs of LR
55 Gal
9 blue leg crabs
5 turbos
1 perc clown
1 lawnmower blenny
1 tiny 4 strip damsel
1 coral beaut angel (dead)
1 perc clown (dead)
1 bi color blenny (dead)
i have 2 hang on power filters and an air pump (i am getting a powerhead soon). both filters are rated for over a 55 gallon tank
tank has been cycled for about 2 months or so.
the clown died first. it looked like all of the fish that died had some sort of disease (ich?). they all had white flakes on them and some flesh looked missing. i was under the impression that this was not a disease that could spread to other tank mates. they all were eating ok. i know i am going to probably get some responses that the tank was a bit over stocked. or that i need a protein skimmer. my angel died today and i havent been able to get him out so my ammonia is probably getting higher by the moment. i added a capful of prime to keep it at bay for now. i am planning on doing a 20-30% water change. even though i just did a 15% water change this weekend.
any help would be appreciated

 

[beth]

Way too stocked for a new tank.
Take a look at some of the pictures at this link to see if what you saw on you fish looks familiar to anything here:
https://forums.saltwaterfish.com/t/127010/diseased-fish-pictures

 

[dhrone]

it def looks like ich

 

[gmflex]

have u tried Ick attack medication??
I had some ick problems a couple days ago

but now after 3 days;its almost gone