Questions from spain!!

DrCarrotTail said:

Sand, or any loose substrate for that matter, is not the best idea with leopard geckos. They can eat it and it can block their intestines and make them unable to digest their food. The heat mat should cover approximately 1/3 of the tank floor and it probably needs to be controlled by a thermostat. If 90 cm is the length then the heat mat size you describe is okay. If it is the height that heat mat is way too big.

I only keep geckos together during the three months or so that they are breeding and they get separate living spaces for the remainder of the year. They are solitary animals in general and keeping them together year round can stress them out. If the tank is 90cm long it should be equivalent to about a 30 gallon. If it is 90cm tall that tank is about the equivalent of a 10 gallon. You can keep 3 leos or so in a 30 gallon and probably only a single leo in a 10 gallon. Make sure you can fit 2-3 hides for each gecko (so if you have three you would need 7-9 hides) in the tank. This ensures they don't have to compete for space in order to regulate their temperature properly

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DrCarrotTail said:

IMO smaller individual habitats are a better choice than one big one. Even if you choose the big one most folks recommend having a back up enclosure on hand just in case there is a fight or if one gecko starts being too stressed out and losing weight. Also, if you pick geckos up from different places you want to quarantine them in separate cages (and preferably rooms) for 60-90 days. They also need to be the same size before you put them together and if opposite sexes they should not be placed in the same enclosure until at least 50 grams but its better to wait until 60. If they start breeding when too small the female can be hurt. If you do get new enclosure(s) remember that floor space (length x width) is much more important than height.

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