[HolyAngel]

If you want a rooting hormone for immersed I would check out SuperThrive, it's not super expensive but it's super potent, I've had a LOT of luck with it in both soil and hygro setups and there was a NOTICEABLE difference in both setups when using it compared to not using it. It should work fine and it's something that can be used all the time for the plants.

I have no idea on it's effects on fish/invertebrates tho so haven't even tried it and don't plan to on an actual aquarium.