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[Bogie]

Well, what's been working for me on the cyano I had was:
I added phosguard to the canister filter, and cut back 2 hours less of actinic lighting per day.
I clean cyano off the liverock with a toothbrush, and turn the skimmer up to wet skim and let the skimmer pump suck it up.
I'd use a plastic fork to scoop the thin green cyano layer off the sandbed into a clear plastic beverage cup, with most of the top layer of sand, until the cup is 1/4 full.
Then, I add a burst of tap water into the cup to stir up everthing, and swirl the cup around, and dump the water off the top.
The cyano and lighter waste material that the cyano feeds off of gets poured down the sink.
I repeat this several times, until I'm left with clean sand in the cup.
I then siphon the sandbed, removing water during the water change.
I clean the siphoned sand too, then put the clean sand back in the tank.
Then added new water for the water change (8-10 gal).
My cyano problem has decreased 95% over the past 6 weeks doing this three times now.

Snails sound like an easier solution, and would probably keep what's left of the cyano behind the live rock under control. I'd hate to have an $8.00 snail eaten by my blue hermits. They already got one super tongan nassarius snail.