I have 2 Rasta Zoa frags and im unsure where to put them. I have a RedSea 170 43gal. I'm using an AI 32hd @ 57%. I see alot of people on Facebook and other forums putting them on the bottom when I do that they dont ever seem to open. If I put them about 1/3rd of the way up they open but I don't have much room for them to colonize.