The best replacement for scrubber is brake cleaner.

The best alternatives to scrubber are rated as following:
★★★★★  brake cleaner
★★★★★  refugium
★★★  chaeto
★★★  skimmer
★★  protein skimmer
★★  carbon filter
★  powder blast
★  air purifier
★  window washer
★  ozone machine
★  fgd
★  absorber
  negative air
  biopellets
  uv sterilizer
  ozone generator
  negative air machine
  charcoal filter
  break free

Your alternative for scrubber is not listed? Suggest!
Speaking about scrubber, one probably shouldn't forget about squeegee.

Other search terms related to scrubber and their ratings are:
★★★★★ squeegee
★★★ sponge
fume hood
You have in mind a companion for scrubber and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of scrubber in all years. Click on graph for more.
scrubber
brake cleaner
refugium