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It is my understanding that no living things should be placed in the RDSB as it will turn it into a nutrient sink when they die. In terms of rotation. If it were my tank I would rotate them every ~2 years. (similar to someone who stated they have been running RDSB for 6ish years) Although the RDSB should *not* crash, its possible so to save yourself I would rotate every 1-2 years... Of course this is my opinion from reading and keeping up with everyone elses thoughts and ideas, not personal experience.
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