I see you have employed a pleco for the sump already Do you have room to reach down into the sump at this point? As you pointed out, just curious how you'll be able to reach down for maintenance?
For mechanical filtration, you can experiment and switch to sock with tie strap to the drain tube down the road if you wanted.
For mechanical filtration, you can experiment and switch to sock with tie strap to the drain tube down the road if you wanted.