Planaria are usually on the glass, it's stylaria that swim in an "s" wiggle. Both are a sign of overfeeding, lack of filter or substrate cleaning etc but not really harmful.
Sokoly, with the amount you feed you may need to do cleaning & maintenance more frequently. On my discus tank I use prefilters to keep "bits" out of the filter & rinse them every day or 2. It's also bare bottom so nothing gets trapped in substrate. I had a thin layer of sand but bare is so much easier. I do a water change 30-50% daily for my juvies.
Sokoly, with the amount you feed you may need to do cleaning & maintenance more frequently. On my discus tank I use prefilters to keep "bits" out of the filter & rinse them every day or 2. It's also bare bottom so nothing gets trapped in substrate. I had a thin layer of sand but bare is so much easier. I do a water change 30-50% daily for my juvies.