Originally Posted by ckusnierek
you wont get shimmer without halides. (well maybe a tiny bit with T5 or VHO)
Well i was about to say that your wrong about the halides being the only way you can get shimmer. Untill you said maybe a tiny bit with t-5 or vho. Because t-5 is the only lights that i have and i get shimmer. maybe not as much as some people consider a shimmer. but in my setup is a 20 gal long and i get quite enough shimmer on my tank. i could go for more but i am satisfied.
Oh and about the power head
thing i have an old little pump aiming at the surface. and a korilia #1 aiming at the sand and the surface. since the korilia has the V shaped output i use it to blow both ways.