Which hydraulic cement did you use? Mine seems to be holding up well.Thanks for the recommendations everyone! Super helpful for future reference. If I ever were to upgrade or redo the plumbing, I will definitely go gate valve with the traditional 45 degree elbows.
We didnt do anything crazy for the aquascape and I’m glad we didn’t because the second we went to bring the rocks from outside to inside, the adhesive fell apart. We tried some hydraulic cement from Home Depot as well as JB Waterweld Epoxy sandwiched with superglue.
The pieces are relatively large/heavy though, and I made sure they flattest piece of rock is what’s touching the glass bottom. I also ensured they were stacked perfectly atop one another without wiggling. So I’m confident in the scapes security as long as I don’t have any extremely large fish (which I don’t intend to have any).
I’ve got a mound to the left, an island in the far back, and a small “hill” to the right. In between the crevices of the hill are smaller pieces of rock with dead coralline.