I'm in a dorm so water changes are super inconvenient for me. Can someone point to me a good formula? I normally dose EI at home but here I'd prefer not to.
My subs is ADA AS.
I have on me KNO3, KHPO4, K2SO4, CSM +B, Ferrous gluconate, GH booster (CaSO4, K2SO4, MgSO4 mix).
There are some land plants you can emerse in the tank that will purify the water, so you don't have to do any water changes. The plants just need the leaves kept above water and require nothing but ambient light.
No special ferts are needed, simply have some fish in the tank.