1700gph pump-Magnetic driven - causing iron def?

i have read on my cal-mag bottle that iron doesnt stay in the nutrient solution too long when a mag drive pumop is working, in my aero systems i have used 1500gph pumps and never an issue, the minute i threw clones in my larger system immediate iron deficieny, could it be from the pump? the new pump is only 200gph bigger but size wise is much larger. my water is well aerated, the cal-mag also said water to needs to be oxygenated along with a grounding rod. i added cal-mag and i see green trying to come back, but its not feasable to add cal mag every 3-4 days, it also can be from the PH flux, i set my solution at 5.5, within 24 hours its at 6.5, and i know iron is locked out at 6.0 and up, i currently use GH 3part with the hygrozyme and cal-mag supplement, i chucked the rez and am currently going with botanicare. what are your thoughts guys? could it be the pump? the PH flux?as we speak i have the clones in my small unit drinking up some dyna-gro, this stuff is very PH stable and any plant i fed this to loves it

Damn. I hope that's not what the problem is. I just bought 2 new mag drive pumps myself- a 700 and 950. Interesting theory though. Have you checked the drive shaft of the pump to see?

And in the past, I've noticed that I have encountered problems when mixing GH nutrients with anything but chemical based fertilizers/supplements not of their making.

actually, since my PH spends more time over 6.0 than under it, i am leaning to the PH, i have since moved all the clones into a smaller unit for controlled testing and using a fertilizer that i know for sure doesnt PH jump, you shouldnt have any problems with your pumps, i had 1500gph monster and had a couple lovely, deficiency free harvests.