Ich or just guppis being guppies?

Aug 25, 2008
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Central Florida
#1
Ive got a planted 10g low tec aquarium housing a few too many guppies. For what seems like months now, I've watched my guppies rub against the sand or a large rounded rock. But only occationally. Also, when one of them does they will do it 3-4 times in a row.
I thought it might be ich at first, but I havnt seen any abnormal scale spots or any other signs of the disease.

Could it be ich, or am I just paraniod?

The reason I ask, is I'm thinking about converting the tank to something else, maybe a puffer, maybe some swords, dunno yet. But I figured I ought to maybe nail down whats up with my guppies & treat the tank (if needed) before I threw something new in there.
If I convert to something new, I have a home for the guppies already lined up.