Here's another idea hehe:
http://www.youtube.com/watch?v=H0ttJ...eature=related

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Sorry 'bout that, I couldn't resist. I've read good things about the microbacter7 when fixing vodka induced cyano. Measuring PO4 during an outbreak won't do a lot of good if the cyano is gobbling it up first. Sorry if it's in a previous post (head ache to bad to read em all) - Have you measured the PO4 in your water source? What are your nitrates now?

It wouldn't hurt to take out the LR and rinse the vigorously in a separate bucket. Your rocks might be full of organics that are leaking out over time. I've read somewhere that fish can convert 50% of food into energy (dependent on tank temp) while humans convert 20%. As far as feeding - What we think is too little may be too much

I have a biocube skimmer that's not being used right now. I have never personally operated it so I can't say if it will help or not.... or even worth trying. BUT I do know that it's past due for a new air stone.