SPS in 28g?

[untamed]

I think I have slightly more than 20gallons in my Hex..but it isn't more than 30 gal. I have a single 175W MH and 2 9W actinics.

I use a dosing pump to add Kalk. (On a small system it is really easy to overdose Kalk!) I started with two part Ca/Alk supplements, but couldn't keep up.

SPS are thriving.

I'll attempt a photo, but I've had trouble posting photos in the past.

Oh...my avatar is a reasonable shot of that tank...you just can't see the light above it.