Lol. Sorry--I realized that about the water after I posted. I did the same thing but tied plants to wood then placed them in the tank. This worked well. I did manage to plant micro swords for my foreground carpeting with water already in the tank. It stressed the roots and they floated a bit but now its fine. If the plants you put into the substrate float up just keep putting them back in. They will eventually stay put and establish. But it does take patience. Im also using Flouish tabs as I have a cichlid sand-like substrate (to achieve harder water conditions)so make sure you supplement if that is sand in there. This is not a great pic of the tank but you get the idea. I still have to move some of the wood around and black out back of tank.It's one of the cheap sun sun's rated at 500gph and it seems to be pushing just about that. Not bad and the tank is pretty understocked anyway. Water is clear and water parameters are good so it seems to be a pretty decent filter for the price other than the plastics are extremely cheaply made.
And unfortunately yes it's already filled with water so that may become a problem. But I like the idea of adding some Java moss , African water ferns, and maybe some sort of carpeting plant if it's not too late
Wow that grew out well though. What lighting are u using on that?Patience is the key. My main flaw when I first started was expecting too much too soon. Here's an example, since you wanted Java moss. This took two months to grow out. Before & after pics:
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EBA is an electric blue acara and the two white things are rocks I place in there for a small hide for the bichir.layout wise as suggested , you can add more bigger driftwood tied with plants , also try to follow the rules of using proper plant ,planting it as a foreground , mid and back , also tidy up your heater and inlet pipe by placing at the sides maybe ,your swords is well placed , by the way whats EBA and the two white stuff on the right bottom ?
I'm using a Finnex Ray2.Wow that grew out well though. What lighting are u using on that?