Home from vacation . . . Could use a little advice.

[Enigma]

I think it is too big to be Ich (though I've never seen that in person, before). I'm thinking it could be this: http://forums.saltwaterfish.com/t/12...o#post_2076263

I did cut back on feedings before we left on vacation. I tested the water yesterday when we got back, and calcium was very low. Otherwise, everything else was good (ideal, in most cases).

What can I use to raise the pH of freshwater if I go ahead and try a dip? I have Reef Buffer and Reef Builder . . . Can I use the buffer for fresh?