Hi All, first post.I am thinking about a group of 10 or more Kuhlii loaches for my new 75 gal planted tank. My ph is in the high range, 7.6-7.8 , but consistant. I will provide some rock caves and driftwood. Will I have issues with Black Diamond as a substraite as these guys like to dig. I have cories and they are fine in it. Also, the other fish in the tank will be Rainbows ( Turquoise ) , Mable Hatchets, and Har.Rasboras. I will also add some Otos after a bit. Do you see any issues with this plan?