Why do my green slimers always die?

[Zoaologist]

Definitely get Alk and calcium higher

 

[Neoalchemist]

Definitely get Alk and calcium higher

What I dont understand is how they would be low in a 20 gallon tank thats this young that doesnt really have anything in it thats using much calcium. I mean he is using AF salt, calcium should not be below 400 unless mag is low, he has a (rare) bad batch of salt, or its being mixed at low SG.

 

[Zoaologist]

Weekly water changes should keep it in check.

 

[drawman]

Alk at 7 is perfectly fine as long as its not drifting, you could bump up the calcium a little bit say to 400 410. This is most likely a lighting issue. When you can get a picture, we can tell more.

Agree with this completely. Your Alk is not going to be a problem but it needs to be stable. I kind of doubt 390 Calcium is doing it but I would aim for above 400 maybe 420ish. NO3/PO4 is fine as well. I would be curious to see a photo of your tank.

 

[jeffww]

Pic of the other acros in your reef?

 

[Mtb_reefer]

The tank is only about a year old. It’s a 20 gallon cube and I have an ai prime 16hd on it. It’s at very high settings so I couldn’t imagine the problem being the light. At the moment I have about 390 calcium and 7 dkh( I know it’s low) my nitrate is about 4 and phosphates are at about 0.06.

Could be getting par hotspots with that light turned up. Not sure of your setting but just seems like a small light like that would have hotspots. What about flow?

 

[SamAPFish]

Pic of the other acros in your reef?

Nope but I can send some tomorrow. I do know one name of a new one I got though. It’s called av99 orange crush acropora. The polyps are fully extended and great color so all my other acros are doing great

 

[SamAPFish]

What I dont understand is how they would be low in a 20 gallon tank thats this young that doesnt really have anything in it thats using much calcium. I mean he is using AF salt, calcium should not be below 400 unless mag is low, he has a (rare) bad batch of salt, or its being mixed at low SG.

Yeah aqua forest salt just doesn’t seem to have a high amount of calcium and alkalinity.. other people have complained about it.

 

[SamAPFish]

Weekly water changes should keep it in check.

I do weekly water changes. 5 gallons