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You get what you pay for in ph pens.

After testing nutrient run off from my tubes PPMs are only 150-200 very little nutrient waste.this was tested with timer set for minimum spray to get this reading longer spray times equal higher PPMs run off. Bottom line I agree with drain to waste being over kill....and yes a waste....

What size chiller you running prof? I have a aqualogic 1/3 hp and for me I have to run a 600 gph anything higher and my chiller struggles to cool to much surface area tubes water lines etc. My chiller is also in another room.

Also consider submersible pumps are not pressure rated and you may not get the results you are trying to achieve. A 950 will struggle getting 5 psi with very little flow you will be working a submersible to its limit.

I see what your up to prof wanting a submersible pump and the nozzle doing a recirculating system just keep in mind about heat transfer from that pump sitting in your reservoir. Really consider a regular pump not a submersible and get some bulk head fittings. Reason I say this is I run 3...

Here is some I'm looking at http://www.bigbrandwater.com/mazzei29.html

You really hit the nail on the head. This is exactly what I do. noticed the round port holes on the end of my tubes I can see what's happening all the time. Another thing I do is measure the run off on drain to waste this lets me know how much they are using try to average 1/8 -1/4 cup waste per...

Yes my system can do fish bones...

I hear ya ,,,been busy working alot myself.

Prof what your schedule look like say nov-dec for it (Thread) HPA vs LPA vs HID vs T5 should spark some interest.

Thanks hey Prof lets do the Pepsi challenge after this run so I can get some keepers to start with not sure what's going to happen.

Forrest Gump for President........

Forest................. Didn't see you sitting there get him forest......lol

Legal medical grow.....Will be adding controller to handle auto top offs and automatic water changes this weekend ,this round had to start from seed so pheno hunting lost my mothers in the move. This is a recirculating and drain to waste system. Converted from hpa drums to LPA tubes no...

Here are some shots Prof... Veg 18 days they been in flower 11 days kinda a mess right now just moved whole system to new home

Well got to get around for work good chatting with you prof have a great day......

That's where I messed up I would take my roots past the fish bones to the fuzzy Pom poms and no mist would get to the center then root rot. And I know what you mean about gnats got attacked by them as well bastards...

Your right....

James may get pissed about us. James Prof made me do it.......if its cool with James later this evening I will post some pics of my complete system.

no never took pics not something I like to post just paranoid a guess. Posted more here than ever.