Lawnmower blennies are great fish for personality - mine was a hoot when I had him.
The only thing is filamentous algae isn't really part of their natural diet. I think it's unusual (maybe impossible, don't know) to get one that eats hair algae. Mostly what they're after is that thin film of algae over hard substrate. You'll see little kiss marks all over your glass where they've scraped it clean.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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