Leather's polyp extension

[mavl666]

I know it's normal for leathers to close and not extend polyps for a few days but I am wondering if I should be concerned.
Usually, one or two of mine would do this but since Thursday all of them are like this. None have extended the polyps. I did a 10g water change Saturday and hooked up the ATO on Friday. They all look good no drooping just no polyps. Should I be concerned or just wait it out? Just weird that all are like this. Any suggestion would be appreciated.

My parameters are: had to use a dip strip as I need new test kits
SG "“ 1.025
PH "“ 7.8 (not sure why this dropped, usually 8.0)
Nitrate "“ 20ppm
Nitrite "“ 0ppm
Ammonia "“ 0.25ppm (API drop test kit)
Alkalinity "“ 300ppm (highest range)

Forgot I did add Kalk this weekend.
Monday I replaced my GFO and Carbon media.

Here are pics of what they currently look like:

 

[r33fbuilder]

I personally would not worry too too much. I've had all kinds of leathers (they're my favorite ) and iv'e seen them go through quite a bit and never have problems longterm.

Normally i wouldnt even think twoice about it but since you say they're all doing it at the same time, there's probably something slightly wrong.

First, your pH is a little low like you say... What kinda salt are you using? Also, is the tank sealed (as in glass/plastic tops covering everything) or anything like that? Poor gas exchange will cause low pH. I've noticed that sometimes i need to open a window about once every week to get good gas exchange. If i dont, the pH drops pretty much every time.

Second, and more likely the cause, the ammonia should be a 0. There shouldnt be any. Leathers are tough, but they're also kinda picky at times and can get ticked off when there's something wrong. Have you added any rock recently, or had anything die? How old is the tank?

Nitrates are a tad high, but i personally dont see a problem with that. I've had tanks with higher nitrates than that and had no problems with leathers.

One other thing... i see you've got a couple hammers/frogspawn in there with them. Normally this never bothers my leathers, but occasionally i've seen them start problems with leathers... Do you run any carbon in your system? If not, i'd suggest that. It can help with the chemical warfare that might be going on.

Keep an eye on the amonia though, or more stuff might start to show signs...

 

[mavl666]

Thanks for the reply. I run GFO and Carbon in a two reactors.

I have a canopy with a screen top and 2 K3 pumps aimed at the surface and I have a sump.

Now that you mentioned it I noticed one of my PJ Cardinals is MIA was there 2 days ago. I have 3 and they take turns guarding on spot. 2 swim around and 1 guards except when I feed but today only 2.

 

[r33fbuilder]

I would keep an eye out for it, have water ready to do water changes if need be. Whenever i've had a fish kick the bucket (specially something smaller like that) it usually doesnt cause too much harm before the bacteria can catch up to the new amounts of ammonia