Re: A Few Questions.
Posted: Tue Jul 03, 2012 10:11 am
Given:
1. I am spoiled rotten, self-indulgent to an extreme.
2. I am unbelievably lazy.
3. If I cannot do it "right" (my own definitions), I do not do it at all.
Therefore:
1. I size my partials by the equipment I can fit into the system.
2. Three 20% serial partials is roughly equivalent to one 50% partial. Also two 30% partials are a bit more than one 50% partial.
3. In actual operation of such systems, if I do 3 serial 20% partials MWF or TuThSa, or 2 seial 30% partials (commonly TuTh) I have done my weekly 50% partial - or a bit over. Note: The system changed is TC (to contain); water volumes drained or refilled are TD (to deliver).
Yes, it all sounds and is in fact a bit complex in set-up. In operation it is basically mindless. Even relatively unscientific fish-sitters can operate these systems after being shown how they operate once or twice. I have always been willing to do extra work once - at set-up - to be able to operate easily for years. All of my set-ups are set for a minimum ten-year life.
4. I can always "fit" a vessel delivering 20% of operating volume into a system. If I can set for 30%, it is better. If I can set for 50% in one operation it is ideal, and simple but a bit wasterful in total volume and equipment and space used.
5. Actual process: A: Drain 20% from the system. B: Shut of reservoir internal circulation & heating if requid; start delivery pump 20% replacement into the system, shut off delivery pump. C: Refill reservoir to 20% level. D: set recirculation internal pump to hold reservoir at temp and O2 level for next 48 hrs.
It is possible to set for 10% daily changes and approximates 50% weekly changes, but to me that requires full automation. That is non-trivially more expensive and more demanding om the set-up. I have done it, but it does require an engineer's eye and skills for smooth and safe operation.
HTH
1. I am spoiled rotten, self-indulgent to an extreme.
2. I am unbelievably lazy.
3. If I cannot do it "right" (my own definitions), I do not do it at all.
Therefore:
1. I size my partials by the equipment I can fit into the system.
2. Three 20% serial partials is roughly equivalent to one 50% partial. Also two 30% partials are a bit more than one 50% partial.
3. In actual operation of such systems, if I do 3 serial 20% partials MWF or TuThSa, or 2 seial 30% partials (commonly TuTh) I have done my weekly 50% partial - or a bit over. Note: The system changed is TC (to contain); water volumes drained or refilled are TD (to deliver).
Yes, it all sounds and is in fact a bit complex in set-up. In operation it is basically mindless. Even relatively unscientific fish-sitters can operate these systems after being shown how they operate once or twice. I have always been willing to do extra work once - at set-up - to be able to operate easily for years. All of my set-ups are set for a minimum ten-year life.
4. I can always "fit" a vessel delivering 20% of operating volume into a system. If I can set for 30%, it is better. If I can set for 50% in one operation it is ideal, and simple but a bit wasterful in total volume and equipment and space used.
5. Actual process: A: Drain 20% from the system. B: Shut of reservoir internal circulation & heating if requid; start delivery pump 20% replacement into the system, shut off delivery pump. C: Refill reservoir to 20% level. D: set recirculation internal pump to hold reservoir at temp and O2 level for next 48 hrs.
It is possible to set for 10% daily changes and approximates 50% weekly changes, but to me that requires full automation. That is non-trivially more expensive and more demanding om the set-up. I have done it, but it does require an engineer's eye and skills for smooth and safe operation.
HTH