Alrighty......
Well I have always used vermiculite/perlite mixed 1 in 1 with water by weight.....for the nesting boxes and to keep the eggs in after they have been layed.I incubated all my python eggs in a home made incubator ( gutted fridge with heat tape inside on a dimmer ). Late in the season last yr I kept having problems with my incubator and actually cooked about 60 eggs(not very happy about that) so I needed a quick fix to incubate the rest of my eggs.......I used a small rubber made put plastic egg crate inside and about 2 inches of water......put the rest of my eggs inside and closed the lid......put the container on a heating pad and hooked it up to my helix and set it at 89 F.......worked like a charm......Ended up with a 98% hatch rate....
So this yr I by passed the whole fridge thing and got a few wrapping paper rubber mades with a few air holes,put egg crate inside about 2 inches of water and hooked each up to 2 heating pads pluged into a helix.......they are just sitting on top of 2 of my shelving units in my tropical room........and seem to be working great......The only problem I see with doing it this way is 1) my eggs are hatching sooner than expected (not really a problem ) and 2) there is alot of condensation that builds up on the lid of the rubber mades and when ever u open the lid it rains on the eggs......( not sure if this is a problem yet) The eggs seem to do really well .......hardly any mold build up ........and they stay nice and plump, but not to plump.......I am currently incubating 1 clutche of Childrens, 1 clutche of Spotties, 1 clutch of Balls,and 1 clutch of Jungles......I have hatched 2 clutches of Childrens 100% hatch rate , 2 clutches Spotties 95% hatch rate ,1 clutch of Balls 100% hatch rate and the latest 1 clutch JCPs 100% hatch rate......This system is the best I have ever worked with in the last 15 yrs