I’ve been using RO line with a short bit of silicone tubing to connect the RO line to the pump head. The extra rigidity seems to handle any solid chunks well, and I’ve never had a clog occur for the last 5-6 years I’ve been operating the system like this. I just route it into the cup through the ventilation holes of the lid, so easy removal and no modifications necessary. Combined with my Vertex skimmer neck cleaner, I can go months (if need be) between cleanings.
I have to look into this. Right now, I can comfortable leave the tank for 6 weeks without any issue. But the skimmer cup will get full and skimmer will turn off in about 3 weeks.