Review on Lightweight HydroBalls Expanded Clay Terrarium Substrate by Zoo Med, 2.5 lbs by Brad Wall

I'd say the largest balls I've seen were just under 0.25 inch/6mm +/-. I think I should have picked the ones advertised as MASSIVE and not the ones advertised as normal/medium. Obviously the folks at ZooMed don't know how to measure things. I bet if you ask them they all have 12 inches between their legs. I'll use them because I need them too, but I'm not happy at all. I need to somehow alter the vents in my case so they don't clog and/or just fall out and scatter. Such a shame. I guess I'll have to cover them with a screen. pain in the ass. you guys suck.