jelly like substance on the canister tubing wall

[chansh]

may I know what's that jelly stuff seems to be sticking on the canister tubing wall?
any prolong harmfulness to my plant and fishes?20151128_152711.jpg 20151128_152639.jpg

[Guppendler]

Most likely is calcium carbonate/bicarbonate deposits, which pose no harm to fish or plants. How long has your canister been running?

[chansh]

Eheim 2215 being running for 2 months or so. Will it go away or I have to flush them out.

[Urban Aquaria]

Those will go away eventually and the hoses will get coated with mulm and algae anyways, so no need to be concerned about it.