Im afraid that is true.
2 years back, I thought coral glue would work on anemones and gave it a try..
Never to make that mistake again.

No, I dont have any powerheads in my tank, and my biggest concern is it stinging other corals. Although I dont have many corals now, I will be adding some in the future. I dont mind it moving around, hopefully somewhere I can see it.

I'm planning to order a retrofit LED kit, would that fix my lighting concerns?

Realy depends what kit your beter of buying a fixture tho