Good question Calin. I've always wondered about specific ratios and things as well.
Perhaps
@valleylynn will stop by and give us some advice?
She's always very helpful.
Or maybe just post this in the semp forum, so all over there can give their opinion?
I have my opinions, but I am much too new to these types of plants to actually call it an "informed opinion."
Good luck,
J.C.
