Mr. Limpet
Aquarium Advice Addict
Ok, now is this level tbsp or rounded? How much would you say for a 55 gal? double it?
It's a level tbsp.
I'm not sure specifically what a 55g would be but doubling sounds like a good start, just remember that when converting plants from FW to BW you want it to be slow and steady to avoid killing them and I had all my plants in place as I was cycling up (added them over a couple weeks time).
I got lucky and found a forum posting with specific info on converting a 29g from FW->BW. Google (once again ) is your best friend for info on BW systems and here's a good link to start with.
Starting a Brackish Aquarium, what you need and what you can keep.