Frogspawn with "burnt" tips

[Questin]

I fairly new frogspawn I have put in my tank has suddenly shriveled up and it's connective tissue is receding.

I have had it for 3 weeks, and it has done very well until this morning. I also noticed a few Zoas staying closed while I was observing this.

One very strange thing I noticed on the very tips of the frogspawn was little black spots, as if it had been burnt.

Now, things that have changed. I have added a clam in the last few days, and I put 6 cement plugs in an eggcreat shelf. Besides this, nothing has changed.

Water is good, all readings are within normal, but I do have a rather high CA. It is over 500, but has been this way the entire time the frogspawn has been in the tank.

I have only tried to do one thing so far, and that was take out a pump, and added a electricity grounder. There were some micro bubbles coming from this pump that I did not really like seeing, and because everything was looking good, I decided to add the electricity grounder just incase.

So, anyone have an idea about the burnt ends? I honestly don't even know if that is normal, but I do not recall them before.

 

[Gundo5000]

My guess is fallen saltcreep.

 

[Questin]

Talked with my roommate, he use to be really into fish tanks. He said it could be the barometric pressure that did it. It did rain and that brought down a lot of ozone and being in Colorado, that really doesn't have that much distance to fall, so without the dissipation of ozone that you would get sea level, the effect could be a little more dramatic.

Guess I will see in the morning.

 

[danskim]

I wouldn't doubt if the problem was the lack of a grounding probe. Hopefully it'll start to heal soon.

 

[Questin]

It's all fine now, I would have to say it was the pressure from the atmosphere like my roommate said. no black tips at all and looks like it did just days ago