I don't empty my tanks when I scrape. Much too lazy for that.
If you want to use a razor, use a scraper with a razor attachment: http://www.petdiscounters.com/c161/Deluxe-Aquarium-Scraper-with-Razor-p4634.html
Otherwise, I just use an old credit card.
If you want to use a razor, use a scraper with a razor attachment: http://www.petdiscounters.com/c161/Deluxe-Aquarium-Scraper-with-Razor-p4634.html
Otherwise, I just use an old credit card.