Is ABS plastic safe for aquariums? I am wanting to use ABS plastic drains to cover my suction inlets. These are 2 piece units used for floor drains and have a housing and a cap that will fit over my bulkheads. Then you can stuff the housing with a sponge and cover it. I know that PVC is aquarium safe, but I am not sure about ABS. Does anybody know?

Thanks!

Works fine for me and over many years.
I guess if you do not do water changes or prune plants/cuttings etc, you might have an issue.

Regards,
Tom Barr

ABS is the chief plastic used for my eheim filter (stated on the product), and I'm thinking most filters would be the same.

Regards,