What are some possible plants that could survive in brackish water? And eventually the SG would be slowly raised over the years to turn into a full marine tank, as the species I want in the tank require it. Thoughts?
I've seen some brackish tanks where Vals and Java ferns were successfully (and slowly) acclimated. I don't know that any would survive full on salt other than Mangrove trees, though. Maybe start introducing some seaweeds and sea grasses at some point?
There's lots of plants that will grow in brackish up to 1.009 such as anubias, java ferns, hygros, vals, bacopa, ludwigia just to name a few, You just need to slowly acclimate them, Now none of these will survive full marine salt levels, If you want to grow plants and macro algeas in a marine setup then look into dragons breath, graciliaria , grape Calurpa and Calurpa prolifera are my favorites