UBICON Easy Use Eco Friendly Coco Coir Bricks for Hydroponics, Gets 7 Quarts, Excellent Aeration, Reduces Weed Growth, Retains Water and Prevents Soil Erosion
I got this to add to my turtle terrarium substrate because I read that Coco Coir is good stuff for them. The two negatives is that they can't burrow into is quite as easily (somewhat a positive as it makes finding them simpler) and that it's kinda messy (but that's fine too as I change their pool water daily). Seems to retain moisture far better than 'forest floor' zoo-med bedding that i've been using. I really like the contrast with the 'ff' bedding around the edges to keep the terrarium frame drier and this 'cc' throughout the middle. I have ff around the pool container as well. 2 bricks are plenty for 6 sqft of enclosure. I'm well-pleased with how it all turned out.