You could also use something like this to cover all cords in the tank
https://www.amazon.com/Gardner-Bender-FLX-3810T-Electrical-Corrugated/dp/B01NAWUM1J/ref=asc_df_B01NAWUM1J/?tag=hyprod-20&linkCode=df0&hvadid=167141218295&hvpos=&hvnetw=g&hvrand=11079397841005424396&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1025858&hvtargid=pla-304569163860&psc=1