Green Star polyp

I have green star polyps but they don't seem to be doing well, they have shrank in size and don't open up as much as they used to when I first got them. Is there something that I can do to make them happier?

I currently have a 100 gallon tank with t5 lighting
2x36" actinic and 2x36" daylight inside a 72" Canopy (is this enough light?)
I run the blue for about 12 hours and the daylight for about ten
I run a Rena XP3 canister filter and have a UV sterilizer
I have two Powerheads to move the water

 

Squirt em with a turkey baster, debris and detritus seems to stick to those guys like glue, can you post your parameters?

 

+1. I even like to brush mine off with a paintbrush under the current of a powerhead.

 

Still new at this forum thing

I'm still new at these forums what parameters are you looking for?

no ammonia
pH around 8.0 - 8.2
Nitrite 0 ppm
Nitrate 20 ppm
salinity at 1.025
temp 78

I don't have any other test kits

 

get yourself some Magnesium, Calcium, and Alkalinity test kits.

 

+1 After packleader told me to do this, mine opened up withing a few days and started looking good.

 

brushing them off

I will have to try this and let you know how that works, do I brush them even it I can't see anything visibly on them?

 

In my opinion on a 100gallon tank, 2 t5 bulbs are not enough lighting, the actinics are purely for viewing pleasure, i had 6 tubes on a 55 and my soft corals looked superb, i have a few hardies now and so have upgraded to 300watts halides, still in my 55, and they look even better, now most soft corals don't require much light , but on a 100gallon i would use at least 4xwhites and 2xblue, just what i would do, you will see a difference....
Hope this helps
.

 

He has 4 bulbs, 2 and 2.