Hi - new to the forum and having filter issues!
I joined up to hopefully find some advice about my filter - I've had a 45 litre tank for 8 months (the AquaEl Classic 60 with AquaEl internal filter) and to begin with the filter worked brilliantly, shooting out a stream of bubbles and keep the water lovely and clear.
The first time I rinsed the filter sponge (in tank water) I noticed the bubbles coming out of the filter were not as strong as they had been before.
A couple of weeks later the bubbles had all but stopped and the filter wasn't keeping the tank as clean so I took the filter to pieces and carefully cleaned each part, (there was a bit of gunk on the impellor but not enough to cause problems I would have thought) and reassembled. Still the same issue, the filter just doesn't seem to be working as effectively.
The filter comes under three year warantee but I don't want to remove it and send back to the company because all the biological filter media will die - I do have an old filter I could use in the meantimefrom my old tank, a stingray one - but obviously this has not been used for 8 months and the filter sponge is a completely different shape/size.
Any advice would be gratefully received - my fish seem happy enough but I'm having to clean the tank more and more and it's a bit frustrating!