John - if you use an u/g filter then you may find several negatives:
- u/g infers the use of gravel .'. you have a ready made space for fry to go
missing in.
- uneaten food will also find it's way underneath the gravel and foul the
water (traditionally, prepared fry foods have a higher protein level).
U/g filters have several million detractors out there - they interfere with
plants and fry. However, IMHO they are OK in a *raising* (not *hatching*)
tank once the fry are of a decent size and age (5mm plus?) and attention is
paid to vacuuming the gravel.
I have a marked preference for using bare-bottomed tanks with sponge filters
- I am lazy and several years and lost batches of fry have shown this to be
the easiest for me. Tetra Brillant (tm) and their cheaper clones seem to do
the trick.
Regards, Andrew Boyd
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Andrew Boyd - andrew at pcug.org.au - http://www.pcug.org.au/~andrew
Rainbowfish Mailing List Archive: http://www.pcug.org.au/~andrew/rml.htm
Canberra and District Aquarium Soc: http://www.pcug.org.au/~andrew/cdas.htm
"A running man may cut 4000 throats in a single night" Klingon Proverb
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