I've used the levamisole as a liquid and it worked straight away on removing the worms. It too was available from farm suppliers. Only a very small amount is required, perhaps the pill has a lot of inactive ingredients and it doesn't dissolve easily. One problem after a heavy infestation is that there may be damage to the intestinal walls where infection can set in (I'm not a medic, just guessing). Ken. ***************************** Ken Laidlaw UK Astronomy Technology Centre Royal Observatory, Edinburgh Web: http://www.roe.ac.uk ***************************** ------------------------------------------------------------------------- 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"!