Hi, I am sorry to hear about ur issues with the cyano. It might be the water or the spctrum of ur Light or the light too strong. I suggest to get RO system so fo r sure eliminate the problem with the tap water. I got mine for cheap from e-bay an it is very effective. Start all over again with the dry method following this http://forum.lowyat.net/topic/2255889
I start according this article and it is all good so far. Develop a good bacteria may be add from bottle. May be add purigen in ur filter. It was too long waiting for that HC to fill in, to give up righ now. "Those who learn from it`s mistakes is smart, but those who learn from other`s mistakes is even smater!" Wish you luck from all my heart, and never surrender.