Fredrik.Ljungberg@saab.se > I mix it with some of the waste water which I have filtered > through peat. I have used 1:3 waste-peat-water/RO-water which > works fine. I haven't had the opportunity to try some of the > really hard species yet (diplotaenia, elizabethae, uaupesi...). Maybe I should clarify this a little, so not to confuse ppl out there. My unit wastes about 6 times the produced RO-water. The waste-ratio is something I can regulate, and I have chosen 6:1 because I can then still use the waste as normal tank water for most species. I don't know if you can do this on a Kent-unit, but I think it's a good feature. Take a look at their homepage http://www.kentmarine.com/ Fredrik L. -again. ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!