Hi Laurent. Yes - a toothbrush or scrub brush - bigger would be better - a brush, not a scrubby pad. One like mentioned above or the type used to hand scrub floors. I know it's a lot of work and a big pain, but I think it will help a lot. Eventually (hthe sooner the better) you'll get to that low(er) maintenance tank! Just be careful you don't drop any rock! Put some newspapers or old rugs on the floor too.
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Excellence in reefkeeping is achieved by mastering the fundamentals, and learning from mistakes.
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