Scum runs away means its natural not man made the skimmer isn't a must. but its apparent the filter might be over worked. for that sized pond i'd treat it more like a n aquarium with water changes and vacuumingWe have a net that we use every day to clear the leaves and debris from the surface, but I will buy a skimmer as suggested, thank you. I will then do a 50% water change and add a few more plants. If I dip my finger into the scum, it runs away very quickly.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.