It is possible that you could use more beneficial bacteria in your tank to out compete the cyano. I have used MB7 for some time now, and it has been very effective in helping keep my tank clean and no cyano.
http://brightwellaquatics.com/produc...robacter7t.php
However, you still have to get rid of the cyano that you have. I have used ChemiClean in the past, and it did the job for me. Not sure if that redcyano RX is good or not.
Not sure if your skimmer is big enough for a 230g. I have the exact same one, but for a 100g. I still have to clean it every 3 or 4 days.
What test kit do you use to measure your phosphates?