I'm almost finished with my 11-plant garden. Thanks for all the info Ron.
In regards to aeration: I'm using a submersible
pump (170GPH). I don't want to run another power cord to a air pump. Can the submersible be used somehow? Can I split the output from the pump and just let one output churn around in the
nutrient tank?
Also folks, at smarthome.com (and other sites) you can get an X10 starter kit for 29.95. The IBM branded version. If you have a computer (which seems a given if you are reading this) this seems a good timer option. I had to order a 3-prong(e.g. grounded) controller for my pump, but those are also being cleared out (Magnavox branded: $4.99).
Thanks again. And, I'm TUI (typing under the influence), so feel free to edit...