I've got Pothos too in the CWD viv but, I thought Devil's Ivy was a different type of plant; probably due to it having several different latin names and some of which appear to toxic plant lists because of the oxalates but, yeah, it needs to be consumed in large quantities to have adverse affects.
Pothos is also called Devil's Ivy I have also used in it my cham vivs and frog tanks with no ill effect.
You can buy them form B&Q although they are usually very large form them - very easy to cultivate cuttings though and it can be done in a few different ways.
If you get one and need help in potting up some cuttings hten just hsout and I can post a few different ways to do it
how much was it from B*Q btw?
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1.0.0 Beardie - Ray
1.0.2 Cresties - Gordon, Tooty and Frooty