SLOW DOWN! You are not going to fix everything in one day.
is bad. Vacuum it off the sand and rocks if you can. Scrubbing the rocks in a bucket of sw
may also help. Without seeing your tank it's hard to tell what is going on. If you could some full tank shots and some close ups of the rock using the macro setting on your camera that might help identify what is goinig on. As Melousu58 stated you may not need to scrub the rocks. Let's see what's on them.
You are going to need several buckets for this. When you siphon the cyano
and other detritus off the sand, that water and whatever comes with it needs to be discarded. The same goes for the 5 gallon bucket you scrub the rocks in, IF you decide that step is needed.
As for a light fixture, therre is a huge difference between VHO
, CFL, T5, MH
lighting systems. The wattage numbers alone do not mean much.
Post a link to the lights you are thinking about (like I posted earlier).