Whats knitting my gravel together?

[dw1305]

Hi all,

Yes I did the add a bit of coral chips to the gravel but it was very hard to add just the right amount

How about adding it to a net bag in the filter? that should allow you to see how much is left. If you weighed the bag when the pH was about right, you could just top it up to the right weight every couple of months.

cheers Darrel