I've found that the Water Hyacinth is an astonishingly good nitrate remover, I know that it's virtues are sung by those ecologists who would like to see more natural methods of water purification for humans. If you look on thekrib.com, you'll find that it is at the top of the list for removal of nasties in general, heavy metals etc. C:-)lin In baking Spain PS Is pete Liptrot still reading? If so could you get in touch? -----Message d'origine----- De: "Jason Sullivan" <jsull97@earthlink.net> A: <apisto@listbox.com> Date: 21/06/01 Objet: RE: nitrates in my tank I have found floating water sprite a VERY efficient remover of nitrates as noted. However, I now have a near constant struggle to keep adequate nutrients in the water. The other plants which stay longer (i.e.- the water sprite soon must be removed or over grow the tank) tend to show the most accumulated adverse effects (phosphate deficiency, etc) presumably because they remain behind. -------------------------------------------------------- You too can have your own email address from Eurosport. http://www.eurosport.com ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.