I listen to a monthly pod cast here in the Uk not sure weather it’s international but my guess would be it’s just here in the uk and it’s 3 experienced fish keepers talking about fish and tanks , And an unusual proposal got put out in this pod cast about filter cleaning , always a worrier about cleaning my filter I paid extra attention to this part and they seem to suggest that washing your filter sponges under tap water has its benefits.... shock horror I know but they way they explained it made perfect sense to me , apparently depending on you’re tank footprint and layout your better off washing your filter sponges under tap water as it will clean the sponges far better and won’t actually kill all the beneficial bacteria apparently here in the Uk there actually isn’t enough chlorine or chloramine in the water to actually fully destroy the bacteria and by rinsing your sponges under the tap removed dead and dying bacteria ready for when you place them back into the canister , apparently the tank size and footprint is a vital part of this as a small 100l under tank hasn’t got the footprint to hold enough bacteria ( made sense to me ) I have 60kg of sand plus 30kg of wood and stones that will be holding a lot of beneficial bacteria. My filter itself is just mechanical the biological media in there is almost redundant, does this sound correct to anyone else ? I can’t imagine cleaning my sponges under the tap but the argument for doing so actually got me thinking