Yeah I'm gonna go to feeding every other day, hopefully that helps with the diatoms. as far as the possible cyano goes, I'm going to try and siphon that out this weekend so we'll see what happens with that. There are some really dark green spots one of the rocks too and I'm pretty sure thats cyano so I'll be getting that out as well.
I'm not running a skimmer on my tank. I just have the cannister filter. Since I've gotten my tank up and running I've been thinking about getting a hob skimmer but I haven't made up my mind yet. Thanks for the info about it though, definitely gave me some food for thought.