Does anyone have experience with Florin Volcanit? I'm currently using EcoComplete fine grade (black) with great success. I'm in the process of expanding from a 28 bow to a 38 bow and will need more/fresh substrate. I see that EcoComplete now appears to only be available in a coarse/fine mix. I have Corys and also like the look of the fine substrate, so not real happy with the direction EcoComplete has gone. Florin Volcanit offers medium, fine, and extra-fine grades, so I'm tempted to try the extra-fine. Looking for feedback. Thanks!