attaching acrylic to acrylic

[Black Phantom]

Weld On #16 has good gap filling qualities so if your cuts are a bit loose it will work fine. For a good solid joint use #3 (dries very fast) or #4 (bit more open time). Your joints have to be tight with these two as they have the consistency of water.
Weld On is the only stuff I use and I've built a good number of sumps.