Thinking about a Recirculating DWC

Alright people.... I want to create a recycling DWC sytem. I would like you all to provide me your thoughts and whether I am missing something.

Here is my plan:

(1) 1000w Digital Ballast with both MH and HPS which will be switched out depending on stage
(1) EasyCool Reflector; sealed with inline air – 6”
(4) t5 Fluorescent lights will be placed around the edge of the cabinent
(6) Five Gallon BubbleBuckets
(2) Air Stones Per Bucket
(2) Dual Diaphragm Air Pump – each running one air stone in each plant for redundancy - each 340GPH w/ 4 inputs
(1) Elite 802 Air Pump – running (2) airstones within reservoir - 20GPH; 2 inputs
(1) 20 Gallon Reservoir w/ 2 Airstones
(1) GrowBright 6" Inline Fan & Charcoal Filter Combo
(1) pH EC TDS Meter w/ Temperature Monitor – will mount to the wall and be dropped into the reservoir bucket to be constantly monitored.

All buckets will be connected to a Control Bucket with a float valve.

The control bucket will be connected to reservoir via tubing and the reservoir will be located in a different air conditioned room so that I can better control the water temperature. I was planning on running the tubing through the attic and then prime the tubing and then let gravity fill the control bucket when the float valve opens.

I was then planning on connecting a water pump to the last bucket that will pump the water from the plants back into the reservoir so it constantly re-circulates.

What am I not thinking of here???? Thoughts?
 
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