I try and tend to put mine at a 45 degree angle at one end of tank,then put an air stone under it,so it cause's a current passed the heating eliment,thus giveing an even heat ditrubution.This also can be done with a power head of some kind.
Tim
The tank is 60x15x26,the fish in pic 8 is a siamese tigerfish(Datnioides microlepis)its stripes have not developed as yet.
the tiger fish are no longer in the tank,the other tank mates in this tank are---
columbian wild oscar
channa melasoma
2x four lined catfish
2x striped talking catfish
Tim
And for those who want to know what they are,from the top.
pic 1-2x poltpterus endlicheri endlicheri
pic 2-polypterus bichir lapradai
pic 3-polypterus bichir lapradai
pic 4-polypterus bichir lapradai
pic 5-polypterus palmas polli,P.e.endlicheri and P.b.lapradai
pic 6-2x P.e.endlicheri with P.b.lapradai in the middle
pic 7-polypterus sengalus senegalus
pic 8-polypterus palmas polli
pic 9-polypterus bichir lapradai
pic 10-polypterus delhezi
Tim