Popular shape for adding plants into rounded pond corners.Fine mesh which allows pond water into plant roots but prevents aquatic compost being washed away.
I you have lost or damaged your old strainer bag simply purchase one of these repalcement strainer bags and carry on as usual.Simply tie bag around discharge hose.
Don't worry about buying a brand new UVC if your Hosetail breaks. Simply purchase a new replacement part which will fit straight onto your existing UVC.