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Re: Substrates again
> From: "II, Thomas Barr" <tcbiii at earthlink_net>
> Personally, I like the no flow idea. Nothing to plug in. Nothing to zap
> you with a jolt of electricity in the tank. Nothing to clog up or break.
> Simple is good. One less thing to worry about. Just you and your dirt.
When opting for No flow/osmosis method, what is your 'dirt'
combo/layering preference? From what you mentioned, anaerobic spots can
be reduced by using less soil... is that garden soil (from the nursery)
you're referring to??.
> Doing a RFUG:
> I could inject the tank with fresh laterite yearly by pushing it into the
> RFUG slowly. This way you wouldn't even have to touch the gravel to
> fertilize. Just pour it down into the RFUG grid/manifold/spraybar and it's
> all over the roots.
When you said 'pour laterite', I assume the laterite (eg. Duplarit G) is
mixed into a slurry and poured down the uplift tube... doesn't the
laterite flow past or clog the substrate level?? I understand the
particles from laterite is quite fine and tends to cloud up the water
> My advice if you wish to do RFUG's: Make your own out of CPVC or PVC. It'll
> cost you far less and allows greater depth penetration and less root
I'm interested in the on 'depth penetration' bit... please elaborate and
do you have any design suggestion for PVC based manifolds to ensure even
distribution of nutrient (eg. PMDD)? A dear friend offered the
XXXXXXXXXXXXXXXXXXXXXXXXXXX X = Tank
X O +-+ +-+ A-A +-+ +-+ O X O = Lift-tubes
X | | | | | | | | | | | | X (both openings above water level)
X | | | | | | | | | | | | X | = PVC pipes with holes
X | | | | | | | | | | | | X + = PVC elbows
X | | | | | | | | | | | | X A = PVC down tubes
X | | | | | | | | | | | | X
X +-+ +-+ +-+ +-+ +-+ +-+ X
He was of the opinion (hypothetically speaking) that nutrient could be
fed down the PVC down-tubes (A) with a reduced flow from a T and
hopefully, nutrients could be distributed evenly. Given a moderate flow
rate, water will pass thru the pipes without coming out from the uplift
tubes. Any comments? ... spacing between pipes, flow rate, etc... It's
a bit early, but I'm planning this for a future 60x30x30inch tank.