hey all, im going to be in the prosses of upgrading my GSP tank from a 29g to a 40g, of which i was going to go marine live rock and deep sand bed, but i went to a lfs to get some frozen foods and saw some knight gobys in full marine and thought i should have those guys jumping around the bottom eating all the shrimp scraps that the puffer deems un fit for consomtion lol we all know hwat happens when we buy fish with no reaserch and going of the intel of the "fish expert" lmao i found out they are not marine but soley brackish. so my plans changed im going to go with mangrove theme, what is the best kept indoors? im planning on getting a grow light to hang above the tank, i will have plenty of light because my 55G bull frog tank has a large grow light above it, as well as i plan on giving it magneium supplements. what species has the best root systyms for habitate and hardyness. i cant spell, 
thanx
thanx