wonder shell

[gonsouth]

I saw an ad online for a product call "wonder shells". It's supposed to add calcium to your water and be very good for all fish, including soft water speices. It's also supposed to help keep PH stable. Has anyone tried these and do they work?

[dundadundun]

how about barr's gh booster? it's well worth the price.

[RodInCALIFORNIA]

wonder shells have been around a long time and i always here good things about them.