All corals retracted after water change

[Kianou]

Please help I change my water yesterday for 30% and now all my coral eh retracted and not happy. I have two torches, one Duncan, one frogspawn and two hammer corals, and few softies. This is the first time that they did this after water change

20g tank
Kh 9.5
Cal 400
Mag 1400
Salinity 1.025
Nitrates 5
Phos 0.05

my tank is 9months old, and I'm just scared beacuse i spent a lot in my tank and corals already and in just one mistake they'll end up dying.



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[IMG alt="eggie"]https://www.reef2reef.com/data/avatars/m/4/4176.jpg?1736039692[/IMG]

eggie​

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Have you always used the same salt brand ?

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Kianou​

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Have you always used the same salt brand ?

yes. is my corals dying? I found out i read .03 tds in my rodi water maybe thats one of the reason.

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[Baby Damsel 219]

check the temp or did you move them around the tank

 

[eggie]

I dont think they are dying. Is the canister filters your only filtration ?

 

[Kianou]

check the temp or did you move them around the tank

already did it's 78. nope I didn't change anything all i did is water chsnge

 

[Baby Damsel 219]

how big of a change

 

[Kianou]

I dont think they are dying. Is the canister filters your only filtration ?

yup i have carbons in my two canister and filter medias. also the filter that i bought for lowering niterate

 

[eggie]

yup i have carbons in my two canister and filter medias. also the filter that i bought for lowering niterate

Are your power heads new ?

 

[Kianou]

30%-35%

 

[Kianou]

Are your power heads new ?

yes i baught it few days ago. i used to have only one power head but I it's not enought. they love my new flow but everything changes when i did ky WC

 

[Kianou]

how big of a change

30-35%

 

[Kianou]

now my snails are falling off and not moving anymore. if somebody have some advice what to do asap

 

[Mr. Mojo Rising]

I notice that your alk is quite high, pushing the corals to grow faster, but the nutrients are very low, not providing enough nutrients to support that faster growth. IMO increase the nutrients or reduce the alk.

I also wonder about your lights, I don't see any algae anywhere, not on the equipment, powerheads, the glass, no where. I get suspicious when I see no algae because if algae can't grow then corals can't grow either, they need the same things. A 9 month old tank should have some crud on the equipment.

 

[Kianou]

I have 10.5 of alk before I WC and i already cleaned the algea from my glass and one of my power head is new that's why it's clean. my snails are also knotout I just don't know what to do