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[APD] Re: strange "things"
Tim Walker asked:
> Hmmn, they [hydra] sound cool. Not bad for the fish?
I never noticed any discomfort in my fish, but the green hydra I had
to deal with stayed pretty small. The largest I ever saw was just
over 1/4" (6mm) including its tentacles. I suspect my regular use of
a diatom filter at the time kept their food supply limited, and they
died off after a few months. I've heard of hydras as long as 1/2"
(13mm) minus the tentacles, so it's not hard to believe they could
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