Hey all, im looking to build a vivarium for sone fire bellied toads and am wondering about a few things. First off i want it to be a fully planted viv but also have about a third under water. So my question is, can i just jave that joined to The drainage layer or should it be completely separated? Also if it is seperated how often should you change tue water? And is there any other small animal suited to clean the water portion that can keep up with the fbt toxin And that also wont eat all the plants? Thanks!