How often do you change the substrate?

[Lorum]

To my knowledge T's don't poop in their burrow

I think that is different depending on the species (or even on the individual tarantula), but yes, they do poop in their burrow. But, in the wild their burrows are deeper and (usually) have branches (in fosorial species), and they can keep boluses, exuviae and poop in one of the "chambers" (or take them out of the burrow).

IMO we should not compare both conditions (T's in the wild and T's in captivity). But I agree, if they are kept under proper conditions, you can have the same enclosure/substrate for the tarantula's lifetime.

 

[micheldied]

I only remove what I find..... Never cleaned before.

 

[tmanjim]

The only time I change the stuff completely is when I have to rehouse due to the T growing out of the current enclosure. Otherwise it is spot cleaning only. I have 38 T's, I can't imagine doing it any more often than that and I know there are alot of arachnonuts with many more T's than I have.