So I was wondering what was the best temp to get the best plant growth? I habe java fern, anubias nana, rosette sword, rotala indica and rose NL moss. Also what did you guys run for temps with any of these plants but still had great plant growth?
Not really.... there are a few that prefer colder water (anacharis, hornwort) but they can usually adapt to warmer temps. Issue is more with warmer water.. above 82 many plants don't do as well....
Temps would be based more on your livestock then the plants.
I wouldn't do an ro unit for plants, if you need it for your livestock fine, otherwise not necessary. RO water needs to be remineralized to add back in the nutrients you are removing (seachem replenish, alkaline buffer, etc)