Tank in Trouble!!

[Taya]

I have had this 10 gallon saltwater tank set up since August 2020. Suddenly, my water is very cloudy and my corals are all very unhappy. What is happening? It looks like a bacterial bloom, similar to the one when I first started this tank.

Stocking: 2 hermit crabs, 1 conch, 1 turbo snail, 1 Nessarius snail (somewhere maybe), two ocellaris clownfish, zoanthids, ricordea mushroom, bubble tip anemone, montipora, xenia, pearl bubble coral.

Tank Parameters:
Ammonia=0ppm
Nitrite=0ppm
Nitrate= 10-20ppm
pH=8.0
KH=8.3 (swinging from 9.3 to 8 often, need help stabilizing)
Ca=420
Mg=1470
Salinity=1.025

Lighting: Hipargero Aqua Night LED ()

Please, any help is welcomed. I really don't want this tank to crash, I am a noob and am hoping that I can help everyone. Thank you guys.

Pictures:
1 is my ghastly bubble tip anemone
2 is a full tank shot
3 is a radioactive dragon eye zoa colony
4 is a little zoa frag rack situation. I moved them closer to the light because when on the sand their mouths are open.

 

[CMMorgan]

Were you dosing anything to lower nitrate? NoPox, Vodka, etc?

 

[CMMorgan]

Your mag is also a bit high. That could be effecting your ability to keep the alk stable.

 

[LegendaryCG]

Any chance you recently overfeed the tank?

 

[vetteguy53081]

Could be bacterial bloom
Mag should be 1250-1300
What test kits are you using?
RODI water or tap water?
Is tank at or near a window ?
Age of tank?

small water change and add a pouch of chemipure blue or Elite which will polish the water

 

[Hincapiej4]

Bring your cal up a bit. Mag should be about 3x your mag. And right now it would put you around 490, too high

 

[Taya]

Were you dosing anything to lower nitrate? NoPox, Vodka, etc?

Not dosing anything to lower nitrates, I think a tiny anemone got caught in my power head.

 

[Taya]

Could be bacterial bloom
Mag should be 1250-1300
What test kits are you using?
RODI water or tap water?
Is tank at or near a window ?
Age of tank?

small water change and add a pouch of chemipure blue or Elite which will polish the water

Using Salifert kits, RODI water, tank near a window but never in sun. It’s in my bedroom. The tank is about 5 months old

 

[Taya]

Any chance you recently overfeed the tank?

Not recently, no. The water has been cloudy for a while so I intentionally stopped feeding so liberally