sorry if this is a repost or not posted in right section. But I have a 3 toed amphiuma, (a 4 foot blind aquatic salamander) He's my baby and pride and joy. He's thriving, eating, enjoys hiding in his cave and hanging on the filter. He has a bichir and 2 rope fish as friends/tank mates, (they all snuggle). I noticed though he loves to dig and burrow. And i did research about them, and this species loves to hide in the mud. But the sand I have in my tank (idk name. Some type of black premium sand of ebay) is idk, compact/thick/dense? Like it takes effort and is hard to dig through. I wanna switch to a mud or dirt or something easier to burrow in, but I don't want something that will cloud or dirt up my tank. I was thinking about switching to pool filter sand but idk if it will be easier to dig or hide in. I would like something like garden soil, but idk how dirty or cloudy it would be? Any advice or suggestions or input? Thanks!