Hello! I am brand new here and have a question about what size gravel to use for a bubbling rock/disappearing pond. We dug the hole, lined it with sand, added the liner, put in more sand, then filled it with #57 gravel. I just came from the "pond" store; they said I should have used #2 gravel, that I would lose water volume with #57 gravel. Well, okay -- but I already have a 5' x 10' x 18" hole now filled with #57 gravel.

So my question is this: Given the size hole we have, and given that we've already filled it with gravel ... should we LIVE with lower water volume, or should we shovel the gravel out and fill it with #2 gravel instead? We haven't put the actual 800-pound bubbling rock on yet; if we NEED to change the gravel, obviously we want to do it NOW before we have the rock delivered and installed.

Naturally, I'm hoping to hear that #57 gravel will work just fine ... but we don't want to have problems later down the road. Thanks!!!!