Its been a few weeks since my last photo update and as you can see I'm still slacking on putting up the rest of my lights. The growth is still pretty amazing in this system even with just 2/8 of the lights I have planned on. I can't even imagine how ridiculous these would look if I had Co2 and full lighting. The only problem I'm having is with a few fungus gnats, whats the best way to rid yourself of this nuisance in a mpb?
Heres some pics of my girls, reservoir, tubs, flexible tubing and trap door lids. This system is using 1" tubing for feed and drains lines to maximize the flow of the 2 danner 1800gph pumps. One being run to the 4 outer plants and the other being run to the 3 inner plants. The amount of water flow with the 1" tubing is impressive but I'm kinda wishing there was more pressure. I might scale down to 3/4 at the tubs to see if this creates more pressure and greater agitation in the tubs. Both pumps have check valves, only one has a bypass which I found unnecessary when using flexible tubing for the feed lines. The flexible tubing is very easy to remove and replace from the check valve's barbed connections. Instead of building a bulky check valve bypass, I just remove the check valve when I'm draining the system.
The other thing I wanted to note was there are 2 different types of 27gal Home Depot tubs. One is the tough box, the other is the strong box. The strong box isn't as good as the tough box, IMO. I have a strong box being used as a stand and its beginning to buckle, so watch your back, collapsing stands not cool.
And my favorite mpb innovation yet...trap door access lids. This idea and the ease of its implementation still gives me a woody. I used a regular utility knife to cut a 'U' in the lid and fold back the square. Which creates instant access to the drains and the rest of the tub without having to touch the cage, netpot or remove the lid. When I'm done with my inspection the little lid just snaps right back into place, when I need to come back, a push of the thumb and the trap door pops right up...