[cjloong]

Hi David

Thanks for your kind introduction.

Cement was used to seal the holes for this pot. There is also another material I use, I can't remember the name but you kinda mix 2 parts of rubbery/clayey like material. I usually soak the cement a couple of days to test for leakage and to cure it.

Silicon is more expensive and can't keep too long. Also, you can't seal a hole using silicon effectively, unless you use a rubber cork first.

Looking at the 1st picture, the pvc was sealed using this material to the drainage hole of the pot, you can see that the material is white in colour.

Aldro pond, that would be interesting. Have you kept it before? I am currently using betta fish to keep the mosquito larvae in check. Wonder if aldro works?

Also, water this pot when I water the plants (sort of like changing water). THis keeps algae in check.