Who Gives A Fish Forums

Why not both? Toss some Hornwort in the back for fast growth and Vallisneria up front for that sleek vibe. Just trim the Hornwort before it takes over.

I'd say that's pretty normal behavior for a meat coral. They tend to expand and contract depending on their feeding schedule and environmental conditions. Since you're feeding it 3 times a week, it's possible that the coral is just adjusting to its nutrient intake.

Also, 400 watts of MH lighting ...

I've had my meat coral for a while now and it's been looking great most of the time - huge and healthy, but then out of nowhere it'll shrink up and its mouth will be slightly open. This happens about 20% of the time, and I'm wondering if this is normal.

I've been feeding it pieces of shrimp about ...