Underworld aqua grit

[Duck and Dive]

Has anyone had any experience with this? Is i ok to use on its own or does it need a layer of substrate on top, also if it doesnt will it be ok for corydoras as i dont want it to damage their barbels.

Thanks in advance.

 

[bigmatt]

Used it - seems fine. I'd supplement with U/G fert tablets adn/or EI to make sure, but had some great root systems developed with crypts. Also had no probs with cory
hope this helps,
Matt

 

[yoda]

i used it once, thought it was ok but strong water movement caused it blow around abit, in the end i capped it with fine gravel.