Ok, didn't do enough looking around before I mentioned the blasting sand. I do know it's not nutritious like other substrates but I pride myself on being able to set up a new tank for pennies on the dollar. When you tell a friend you can set up his 55g with a filter, heater, co2infusion, plants, fish, rock, gravel, driftwood for 100 bucks, you can't afford to spend 80 dollars on laterite. I appreciate though that y'all didn't burn me for mentioning something y'all already know, I hate that crap.
I suppose if you know about that then you'd know about growing your "submersible" plants in hanging baskets on the patio until they get big and then putting them in the tank or taking them to your local pet store. I have a giant hanging basket full of purple waffle that pays for all my fish food with just a few clippings. You'd be surprised how many fish lovers know nothing about plants. I was pretty new to the whole co2 ideas so nobody knows everything.
Lots to read, thanks for the good treatment.