ScotJudd
Aquarium Advice Addict
I have a 200l tank and use a 10l bucket for WCs. I assumed as one bucket is 5% of the tank water volume then 10 buckets would be 50%.
Not so. The first bucket changes 5% but subsequent buckets remove some of the new water added. It turns out that 10 buckets only change 40% of the original tank water. To do 50% will take 13/14 buckets.
Of course if 10 buckets are removed and then 10 buckets are replaced then this would be 50%.
The percentage of original water changed really starts to fall off after 5 buckets (25%).
So now I do 25% more often than I used to do 50%.
Sent from my iPhone using Aquarium Advice
Not so. The first bucket changes 5% but subsequent buckets remove some of the new water added. It turns out that 10 buckets only change 40% of the original tank water. To do 50% will take 13/14 buckets.
Of course if 10 buckets are removed and then 10 buckets are replaced then this would be 50%.
The percentage of original water changed really starts to fall off after 5 buckets (25%).
So now I do 25% more often than I used to do 50%.
Sent from my iPhone using Aquarium Advice