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FAQs on Algal Filtration: As A Source of Food

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Harvesting algae from algae filter    4/9/10
Hello crew! I've been regularly visiting your site for a few months now and wanted to thank you for making so much information available all in one place.
I've recently built an algae filter to help control nitrates and phosphates, and it seems to be doing its job. My test results have gone from nitrate levels being off the charts to around 15.
<Ah, good>
I've read on several websites that you should not harvest the algae on the filter and feed it to your fish. I was curious to know why.
<Mmm, two possibilities come to mind... the concern that you might end up "re-entering" whatever nutrient was taken up by the turf algae, and secondly, that the algae might prove distasteful, perhaps toxic. But... I'd try a bit of the turf algae and see if it's accepted, and likely use part of it this way on an ongoing basis>
If I'm not mistaken the algae on the filter shouldn't be any different from the algae in the aquarium right?
<There is a huge variety in algae, but the types/species usually cultured in these filters is not toxic and is palatable to many fish species>
Don't think this pertains to my question much but my setup is as follows:
75 gallon tank
Ehime pro II canister filter
Ehime classic canister (used to return water to the tank from algae scrub.)
Both are primarily filled with ceramic media, all but 1 small sponge have been removed and I can't for the life of me remember what the other media in there is.
about 80 lbs live rock
2 inches crushed coral substrate
Water temp 82
Salt reading on meter is 1.22
<1.022... I'd be raising this Spg. Read here:
and the linked files above>
1 Emperor angel
1 Cream angel
<Mmm, what is this?>
1 Red Sea wrasse
1 Lawn mower blenny
2 Ocellaris clowns
1 long spine urchin
1 cleaner shrimp
3 large hermit crabs
1 turbo snail
Thanks again for all your help!
<Thank you for sharing. Bob Fenner> 

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