It is possible that the rough surface inside that hose is allowing "snot" to build up on the interior. Almost like plaque building up inside an artery, blocking blood flow. Once a small piece grabs hold, it will start to collect quickly I would imagine.
And you're probably right - a pre-filter probably won't help.
I agree with those who have suggested to skip the "pond hose" - it's cheap and will crack and split easily on you. If you're going to all the trouble to replace, use Flex PVC.
And you're probably right - a pre-filter probably won't help.
I agree with those who have suggested to skip the "pond hose" - it's cheap and will crack and split easily on you. If you're going to all the trouble to replace, use Flex PVC.