I've a love hate relationship going on with my cyano as well. I've never been able to completely get rid of it although what I do occasionally is introduce an "Allan Storm" where the light is blocked out entirely for two days. Then start the light back on in a two day period where I'm back to where I was prior to the allan storm.

That's only temporary in my case as it's come back.

I've done the Kristy fix as well. Not sure if I had as much flow in there as I do now when you and your hubby came over, but for as much flow as I have I'm sure I've still got a space or two with low flow, so look to see that all areas of your tank are being moved around by water current.

Third thing is to back up Chris and Aggiereefer, cleaning your food and a nice macro collection in your fuge will pay dividends.

My problem is that I'm way lazy on the water changes and cleaning my food seems to take a lot of willpower on my part.... but when I do it I can see results so you shouldn't have any problems if you follow their advice.