I got carried away with weekly maintenance on my juwel 260. I decided to take the filter apart and clean it, so I looked online to see how. Turns out it was the simplest of simple things so that was ok. While I was watching the video, I noticed the guy taking out the filter frame with the two sponge filters, then he reached down into the filter and pulled up ANOTHER filter frame with two more sponges, so of course I had to look. I did indeed have another frame in my tank which has been running now for around 18 months and it was THICK with crud.
No wonder I get zero nitrate readings, this thing must have been jam packed with bacteria and I hate to think what else.
No wonder I get zero nitrate readings, this thing must have been jam packed with bacteria and I hate to think what else.