jesse hull on sat 16 apr 05
I worked in a greenhouse for a few years. I can tell
you from experience that most aquarium pumps are made
for less viscous solutions than glaze -or nutrient
water. Pond pumps can push thicker liquids, but most
types of either are designed to work only as
submersibles, as the water acts as the coolant for
it's motor.
There are sump pumps (which may be too powerful) and
then other types used in the horticultural industry
that can handle thick liquids and operate "in-line"
with two pipes/ tubeing connecting what is to be
drained and what is to be drained into. The latter
is what I would recommend, but any of these may be
cost prohibitive. A small aquarium pump designed for
use underwater will, sooner rather than later, burn
out on you if your not submerging it and also watering
down your glaze... then again you can find these for
as little as $10, so they could almost be treated as
"disposable".
Submersible Pumps that I've used and highly recommend
for long life are those made by "Little Giant". A
manufacturer of a confident non-submersible (in-line)
type to look into is "General Hydroponics", but they
get expensive.
I found a line called the "Maxi-" and "Mini- Jet"
pumps. The Mini- has the capability to switch from
low to hi volume, and they claim it can work both
submerged or not without overheating if run dry.
Although I can't personally vouch for it, the
"Mini-Jet" (@$21-) sounds like what you'd need.
Hope that helps,
~jessehull.
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