But what if you don't have a DT big enough for all those sponges? I'm just trying to not have to maintain 3 tanks for 76 days plus. I have my DT, coral/invert QT, and of course fish. I'm surprised this topic hasn't been discussed here. There were 2 people in my quarantine thread that said they use TTM. I'll ask them what they do.
This isn't to say anything bad about anyone in particular (seriously), but there are a LOT of people who do various methods *kind-of* correctly.