Has anyone got any good ideas about those hopeless plastic suction cups supplied with heaters, filters etc.?
Mine always go hard, and lose their suction.
With my Eheim internal filters, I overcome the problem partly by suspending the filter with a piece of soft copper wire, bent over the side of the tank with a heavy bolt dangling outside the tank as a balance weight. It sort-of works but is not very elegant! Unfortunately most of these suckers have non-standard ends to connect to the heater or filter, so I don't think its just a case of buying a new suction cup. Are they available as spare parts from Eheim,etc.?