I have a meter and would be glad to help out.They cost allot so I don't really lend it out.Calm sea quest also has one if you know him.With that shallow of a tank it will be very easy to overpower your frags and suspect that's what's going on.LED's penatrate water very well and are very directional without good reflectors.I'm tied up for the next few weeks but would be glad to lend a hand.How high do have the LED's above the water line?? I would wag you need to be atleast 14 to 18 above that shallow of a tank. My new motto is loose the bulbs!! Ha Ha