GK...Here are 2 pix as per your request...How's that=for service?

GG...ROwater is my abbreviation for Reverse-Osmosis...
basically a water purifier that using reverse Osmosis to pressure out all the minerals/metals in your tap water.

Once purified...I add Botanicare's Calmag+ to add back the appropriate minerals and buffers that are necessary to create a thriving photosynthesis...that was a mouthful. LOL

rockwool is either your best friend or