As previously stated they are probably very similar, maybe the triples have a touch more red. What I'd definately say is not to buy the extra large ones as often apistos are at their most reproductive as they get up to full size. Older males and females can lose interest in spawning. 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"!