Ohio'sBest

Soilless potting media, I distinguish from just media. I use a soilless potting media for plants that I intend to send out of state - Fisons Sunshine Mix No. 1. It consists of coarse peat, perlite, vermiculite, and pumice. Using this for hydroponics would be counterproductive. The peat holds so much moisture that it would take several days for it to dry out. Watering it every 15 minutes alternatively would keep the medium wet constantly.

I use a mixture in a wick type hydroponic system that is simular to yours. 2 parts Peat Moss, 1 part Vermiculite, and 1 part Perlite. For every 5 gallons of mix add 1 cup of hydrated lime. This also works good as a stand alone mix.