Everything is different, depending on how many fish you have in the tank.
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turn your tank over per hour
- Thread starter telley
- Start date
There are no hard and fast rules...
When I had my 100, my 2 emperors and a Eheim 2028 combined would do about 10X turn over...
In my current one, I am currently running 2 2262, 3 2028 and a Sunsun for about 6X. To do over 10x in large tanks, one has to really try to distribute the flow because I have seen close to 6-700 gph flow rate like from an output...I do not want to see what a 3000 gph flow exit looks like.
When I had my 100, my 2 emperors and a Eheim 2028 combined would do about 10X turn over...
In my current one, I am currently running 2 2262, 3 2028 and a Sunsun for about 6X. To do over 10x in large tanks, one has to really try to distribute the flow because I have seen close to 6-700 gph flow rate like from an output...I do not want to see what a 3000 gph flow exit looks like.
Turnover rate is more or less a metric that correlates to biological and mechanical filtration. The higher potential NH3 to water ratio you have at a given feeding, including unproccessed protein from prior feedings (i.e., the higher the protein content to water modified by the pH level), the more significant the turnover rate becomes. This needs to be considered against the efficiency and size of the current bio media available.
All other things held constant:
1) more protein higher turnover
2) less water in the system higher turnover
3) less bio media higher turnover
4) less mature BB higher turnover
5) higher pH higher turnover
6) less efficient bio filtration equipment higher turnover
7) more ammonia sensitive animals higher turnover
8) less dissolved oxygen higher turnover (due to greater stress on fish respiration)
9) lower tank temperature higher turnover (due to less efficient BB)
Mechanical filtration can be accomplished at varying amounts of expense with less turnover, by adding more pressure through lower micron media. Limits to turnover can be the fish stress levels and the practical limits of piping (around 8-10 feet per second.) There are some opinions that there is a practical limit on nitrate removal at excessive speeds, but I haven't seen a formal test of that.
All other things held constant:
1) more protein higher turnover
2) less water in the system higher turnover
3) less bio media higher turnover
4) less mature BB higher turnover
5) higher pH higher turnover
6) less efficient bio filtration equipment higher turnover
7) more ammonia sensitive animals higher turnover
8) less dissolved oxygen higher turnover (due to greater stress on fish respiration)
9) lower tank temperature higher turnover (due to less efficient BB)
Mechanical filtration can be accomplished at varying amounts of expense with less turnover, by adding more pressure through lower micron media. Limits to turnover can be the fish stress levels and the practical limits of piping (around 8-10 feet per second.) There are some opinions that there is a practical limit on nitrate removal at excessive speeds, but I haven't seen a formal test of that.
