Ideas for safe assembly

[DogLady0142]

Hi all

First time posting in the group. I'm a newbie Axolotl owner. I'm making a lid for my tank, so I can have my fan and lights sit on the top without falling in the water. I'm doing this because I cracked a tank already putting the aquarium fan on and I don't want that again. So I've used a PVC piece as a frame for the plastic grid stuff. I'm not sure how to assemble the frame with aquarium safe products. As a last resort, I'll use "L" brackets and some tiny screws.
Thanks in advance for your ideas

 

[wolfen]

go to a model shop (as in sells trains, model animals etc..) get so plastic glue solvent, it will stick/weld the plastic together and once it has evaporated leaves no residue.