Fish dying for no reason

[dubaireefer]

Hi everyone I have a 55g tank with a 15g sump. I have used live argonite sand white and black about 40 kilos as substrate. I am not sure how much lbs live rock I have but I feel its enough, 2 wave makers and a kessel 150w blue light.

Currently in my tank I have a yellow tang, one clownfish, lionfish and a domino damsel. All the fish are very small.

Also, I have one bubble tip (back of the tank), one white anemone not sure of its name, a mushroom coral, yellow polyps and glove polyps, 2 sea pens, one elegance coral. All my corals are doing well.

My water parameters are
Salinity 1.022
Calcium: 480
KH - 14
Phospate - 0
Nitrates 20

I am loosing some fish I am not sure why ..First my bannerfish died, then my clownfish . Both had similar symptoms..the night before they didnt eat properly and morning dead. The other fish seem healthy eating well etc. I feed them frozen mysis shrimp

When I checked the bannerfish its scales were coming off in my hand, and the clownfish had no signs of disease.

 

[Newsmyrna80]

How long did you have them before they died? Did you quarantine? Need more details on the fish's condition, eating, breathing, etc.

 

[ahmed_iAM]

Might be a parasite. If another fish dies you might want to cut it open and see if it is one. That can ruin a system, but that is also the worst case scenario.

 

[dubaireefer]

I had it for a month , first symptom was sluggish movement, than it became lethargic, then reduced appetite. When I picked up the dead fish its scales came on my hand. Is this is a symptom of whitespot? I saw no spots on the fishes body

Update my tank water suddenly became cloudy:/

 

[dubaireefer]

ok i think i know why water is cloudy..i threw away the dirty cotton and sock filter and I cleaned out a sponge ..and added new clean ones...could that be a reason for cloudiness?

 

[Betta132]

Bannerfish is too large of a fish to keep in a 55g.

 

[dubaireefer]

Bannerfish is too large of a fish to keep in a 55g.

The bannerfish was the size of my thumb and thanks your comment helped a lot.