Hello,
Um... I guess a little bit of history would help. The original C-1501 had CO2 injected before the pump whereas the previous PM designs didsn't. Therefore the claim by Korallin of a more efficient unit. Now that PM have this aspirating venturi feature as well, it would be the same.
Now, if you can control and monitor the bubble rate over an extended long period of time, say a week or so, you shouldn't have to worry about bubbles building up and eventually cavitating the pump. But you eed to make sure that bubble rate, drip rate, and effluent pH stays constant the entire time. Also, over time, you may have build up at the drip line that will slow your drip rate just so slightly to get it out of equilibrium. And don't bother trying to control the CO2 by monitoring the effluent pH with a pH controller. It won't work because CO2 will continue to bubble into the unit long after your solenoid valve has shut down. It's only good for preventing a non-stop CO2 injection after excess CO2 build up is found in the unit but won't be good for fine tuning. More of a safety measure but I'd rather just plug the solenoid into the wall.
Another problem is that the Korralin design draws fluid from the top, and the pump has its outlet facing sideways. These only helps it to cavitate sooner. The pump, need not to mention, is very undersized and the claim of not requiring a feeder pump would only work in the best ideal situation.
On the C-1501 I also had to use a screwdriver and a wrench to open the unit. It's just not that user friendly I found.
Titus
Quote:
|
Originally Posted by andresont
Could cavitation be there because of too much Co2 dosed? these need only 10 bubles / minute compare to others 2 bubles / second ?
|