Thanks,
The guard creature does his fair share of eating

Never knew that he would like his veggies.
Yep those would be everbearing strawberries, however since this is their first year I won't let them produce fruit or runners. It's hard not to let them set but should be worth it. Don't tell anyone but there are weeds in there.
Jinman,
We use a concentrated liquid fertilizer added to 48 +/- gallons at a rate of 1 oz per gallon. Not exact math but you get the idea. The media is a mix of perlite and coconut fibre which does not hold the water mixture the same as a traditional soil bed would. This system runs 4 times a day on a timer so the plants are kept moist and fed. The timer is set to run just long enough for it to start a steady drip to ensure that all plants got a fair drink.
I would guess that since it is a pure liquid mix that the fertilizer would be absorbed at an even rate, assuming even watering. The excess water drains out the bottom pot so I do not end up with a soggy bottom
I'm curious now to see if there is any build up in the bottom pot, however my guess would be not.
I've never been a huge fan of the loss of water thru the design of this system so I've purchased the items for a recirculating system. I've got it almost ready to go, just have to fill and plant. Once I get that one setup I'll upload a few pics.