Hi, Something was lost in the translation, Torf Bomb means "Peat Pump" It is used by many German discus breeders. The Zeolite actually exchanges some magnesium and calcium for sodium and scavanges out the ammonia, the peat, ( I would use EhfiTorf, a strong clean peat which is in convenient cubes which don't crumble and fall apart) further softens the water. By the way, Lewis your filter is en route. ------------------------------------------------------------------------- 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"!