Help for progress

[nano_reefr]

Hello guys
This is my 21 liter tank, its inhabitants are as follows v
1 snow gobi
1 clown fish
1 number of sixlines
3 nerite snails
2 turbo snails
1 narcissus snail
Corals :
Zoantus polyp
Xenia Pompey
Mashroom
polyp star
anemone bulb rose
trumpet
Wall Hammer
Clove
Christmas
Montepura
Constant water parameters The temperature is kept constant at 25.5 degrees Celsius by the thermostat 1.025 or 33ppt water salinity is kept constant by the water level regulator Nitrate has recently increased from 5 to 10
Phosphate 0.107
Calcium 450 Magnesium 1350
KH 8.5
Spectra LED light V2

 

[nano_reefr]

I would be grateful if you could help me in the maintenance of Montepura and Christmas. Unfortunately, I have hydroids digitate in my tank and Montepura is in shock due to falling on the sand, targeted feeding with planktons and contact with the polyp star

 

[nano_reefr]

Christmas & Montepura