Very nice SC very nice.

oldsanclem - You can a Ph controller for less then 200.00 bucks on eBay. You will need CO² tank and regulator with a 120v electromagnetic switch but you can get one for less then 100.00 bucks from eBay.

I don't use one and have no need for one but you said they cost 5-10k and that is not correct.

I move my Ph up and down to match the plants cycle and the nutrient requirements at that point in time for the plant. An auto system does not give me that option and for me I get great results by varying my Ph.

It may not be for everyone but it works for me.