Re: Fry Flo-Thru Rack

[Wright Huntley <jwwiii at pacbell_net>]

A couple of comments, Tom:

If you ever let a strand of spawning mop hang out and slowly drip on the 
floor, you will realize that a slow drip can give you several 100% water 
changes per day in a shoebox! More is really overkill.

A double-"J"-tube outlet/overflow will easily handle the slow drip inlet
rate, even in bent polyethylene ice-maker tubing. One problem will be
devising a perfect non-clogging baby filter for the outlet tube. I like
coarse foam for that.

Inlet-clogging problems are always possible with valves. I like a strand of 
mop yarn drawn through an inverted "U" siphon (ice-maker tubing, again) to 
create the drip. It is self starting (by capillary action) and quite 
reliable, IME.

If filtration and planting of the sump are adequate, IMO, disease spreading 
is probably not a serious problem. Fish with continuous water change are 
able to resist most common pathogens, so they just disappear, even if 
introduced. 99% of fish diseases seem to be a secondary result of bad water 
quality or sudden damaging shock of some kind. Your system precludes those.

The remaining 1% are like the super-virulent strain of *Oodimium* that wiped 
out my KOR. Incoming quarantine is the best preventative for those, I think.

That's my US$0.02.

Wright

The Cooks wrote:
 > Tom Cook here in slushy Cincinnati. I am building a rack for fry
 > shoeboxes.  It will be capable of holding 15-20 shoeboxes and will have a
 > 40 gal. sump to supply the water.  My question is how much water flow
 > should I supply to the shoeboxes?  - a slow drip, a stream, or a jet?
 > Also, Wright (I think) mentioned using ice maker kit tubing for the
 > overflow. Will this drain fast enough to keep up with the water input?
 >
 > I am also debating whether to have it recirculating with lots of plants
 > and a filter or have it pump only new unused water and flush the overflow
 > to the sewer.  The disadvantage to the latter setup is that I have to
 > monitor water usage and make sure the sump has enough supply of water.
 > The disadvantage to the flow-thru is the possibility of disease spreading
 > to all of my fry.
 >
 > Any thoughts or comments?


-- 
Wright Huntley -- 209 521-0557 -- 731 Loletta Ave, Modesto CA 95351

      We have a million monkeys typing on a million keyboards.
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