This guy came into my thread about going to heaven and started asking me these questions for him and his daughter, I'm clearly trying to help him and...
I find liquid to be very convenient...sure there will always be a downside but that's a given. I'd say just try something affordable to start and see...
More info needed...r you attempting ebb n flow or ebb n grow? You can just fill the tub with hydroton, no pot necessary, and simply space the plants...