that will be going through the block walls of my filter system? It's a tight fit for the pipes but they fit through fine. Should I put some along the inside of the block beside where the pipe will go, or should I just patch around the outside of the hole with it?
Question #2 - I'm going to use some Drylock or Quickrete concrete repair for a crack in the old pond wall which is concrete. Which is better?? I have both. Would this work for around the pipes coming through the walls? I'm just not sure what to do to be effective and I certainly don't want to have to go back and patch it when I'm up and running (whenever that'll be)
Thanks for any suggestions!