Can't figure out how to get rid of this

[sasha]

Hi Rich,

Thanks for suggestions. I was wandering if send bed require time to seed and cycle itself then by siphoning it I remove valuable organisms that do this job. On the other hand, If I don't remove organic, as you mentioned, it will fuel cyano. Looks a bit confusing, even though correct in both directions. How often do one need to siphon send and do one need to do this under LR (can't imagine how though ;-)).