I found an article for a pond with a false bottom - exactly what I'm looking for! I'll get the address & post it. Pretty straight-forward.

The article referred to a "trickle filter," so I've been doing research on those. Looks like there are lots of DIY filters out there: they differ somewhat in design & supplies, but all seem to work on the principles of biological filtration and seem fairly large. Somewhere I read that there is a formula (?) for turtle filtration based on GPH water moved, so hoping that LARGER IS BETTER!

Anyone have experience here? Some of the articles I read stressed doing water checks to check for ammonia & nitrites, but those were for fish ponds or for aquatic turtles, not boxies. Would you care for this water the same way you would if it was for aquatics? If so, what would you use to "seed" the filter? Would adding some plants help the water quality? (couldn't hurt)? How best to work in a pre-filter?

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