I'm now running an Eheim pro 2, but I have a Rena Filstar xp for 75 to 100 gallon. Stopped using it 3 to 4 months ago. I washed everything out really well, water only, and dried it before putting it away. I have the three different grades of sponges, the star balls, and ceramic figure 8 things in the large media box. Was thinking of boiling everything before restarting it. Any input would be great. Selling it to a friend to replace whisper gravity filter. Don't want to kill all of her fish!