Trina,
In my opinion, I would not go with mangrove because i don't think it is worth it for couple reasonss
1) You need to run lots of them to export nutrient. For heavy stock, i think you need like 1 per gallon. Lots of ppl say 1 per 10 gallon but with my reef setup, i found I need way way more. I took them off after using them for one year because pellets was much easier and more efficient. I prefer Cheato over them
2) They consumes lots of Mg so you will need to dose Mg regularly to keep your Calc and Alk stable.
3) you need to trim of the leaves to prevent it falling into your sump
Why not using chaeto instead of mangrove?
Just my 2 cents
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