Zoo MedHydroBalls Lightweight Expanded Clay Terrarium Substrate, 2.5 Pounds

Cannot see the valls in photo they are at the bottom for drainageExactly what I was looking for! Worked so well in my terrarium as part of the substrate would definitely recommend/buy again whether for plants or bioactive terrarium

Item was exactly as it was described by the seller, was on time and packaged securely.

Works great for smaller spaces

Perfect for the first layer of a bio active tropical enclosure.

Works well enough as a drainage substrate, I like it alot better than other types as the clay balls are nice and smooth and I don't have to worry about it scratching or breaking the glass of my geckos tank. The bags are kinda small though so even for a small tank I did end up needing a couple bags, and honestly still could use some more.

I bought Zoo Med HydroBalls to use to re-root a phalaenopsis orchid.Other reviewers have commented on the importance of rinsing these well—they are absolutely right. These carry an astonishing amount of dust with them. Mine arrived in good condition with no crushed bits. The amount of media you get for the price is excellent (but check with your local pet store if you typically pay shipping on Amazon.com orders—you may be able to get them for a similar price). I have been using these for a couple of weeks, so I can't comment on their durability.What I especially liked about these HydroBalls was their size. They are about 1cm in diameter, or 3/8". The last time I bought clay spheres, they were between 1/2" and 5/8" (which is good if you need more aeration). For my situation, the smaller sphere size is ideal. I think these will retain a bit more water in the winter, when it is very dry and my orchids typically struggle. The HydroBalls mixed well with some of the usual orchid potting medium.Note these will also work well for you if you're developing a comedy routine, but you're out of banana peels. If (when) you spill some, make sure you find them with your eyes instead of your feet.

Always use this stuff and it does help a lot. Great for maintaining humidity and drainage as well.

This drainage layer has really made a difference. When I tried to go bioactive without a drainage layer I got bugs and my plants died because of moist build up. When I gave it a drainage layer wow it impacted my enclosure and made it so no bugs and my plant flourish.