gearyboy
Fish Fanatic
My first tropical tank its a 126ltr/29gallon tank. I set it up on saturday adding gravel which i cleaned, plastic plants, rocks and the heater/filter has been running ever since. Ive noticeed today there is a brown/yellow substance around the vents of the filter where the water enters.
1) what is it?
2) just take filter out and clean?
Cheers Matt
1) what is it?

2) just take filter out and clean?

Cheers Matt