Ok. I used this glue 3 bottles before..I just gave up after taking measures to prevent the cap from hardening but it sti does. Not sure which batch was mine but I had the same problem. Couldnt stick well. So bought epoxy and bsi. tot it was my rock based or what..If only this posting was earlier then I could have change..
Really wonder how things gona turn out. This one must have planning and research done a lot.. filtration, skimmer must be super huge, waves, top ups... List go one..cant imagine.
Looks good for a koi pond though..