"Richard Reynolds" writes:

also some of the rio's are more plankton friendly than mag/maxijet

How do you know? I don't disbelieve you, it's just that this
(plankton mortality in pumps) is a subject of real interest to me
and I'd like to know what information you have.

Regards,
Ross

-- Ross Bagley http://rossbagley.com/rba
"Security is mostly a superstition. It does not exist in nature...
Life is either a daring adventure or nothing." -- Helen Keller