<a href=showthread.php?s=&postid=15651164#post15651164 target=_blank>Originally posted</a> by crvz
Good to hear you got everything worked out. What I've found (I've used mag pumps external myself) is that the plumbing fixtures can often be the reason the impeller housing doesnt seat well on the body of the pump. Looks like you've got a pH probe coming off yours, which should be fine now that you've got the problem solved, but if it returns make certain that there's no side-to-side loading on the plumbing coming up off the pump (make sense?).
Jeff had some observations on the plumbing of the LRC-2 in response to the above observation:
"Even though the pvc plumbing into the Mag7 is rigid, the pump
itself is free to align itself with this plumbing since it does have some
play when attached to the pump base. Plus, when I glue the pump base to the reactor platform the pvc plumbing is cinched up tight to the pump, the base is slid onto the pump as aligned with the plumbing, and then the base is glued down. There is not any "misalignment" of the plumbing with respect to the pump, thus no impeller housing seating problem."
And here is an important observation from Jeff about the way the pH probe is mounted on my LRC-2:
"Ok, you have your pH probe holder mounted incorrectly. It will work this way but puts the pH probe at a position that can easily get knocked. If you turn the clear "T" fitting 90 degrees, put the pH probe compression fitting on one of the other "T" ports you can mount the probe vertically. You will also need a right angled hosebarb to get the hose going upwards. Just thought you might consider this if the current probe position is not very safe."
Fortunately, my CA reactor is in a protected location under my stand, where it is unlikely anything will hit the pH probe in that location. However, I plan to look into Jeff's recommendation to see if there is a better way before final tests and operation.
Finally, Jeff discussed Melev's reactor and the way he has it set up:
"Ok, now a comment on Marks reactor, if he is still running it the same way. He has a pH controller on his reactor. The nice thing with a calcium reactor is that your aquarium pH will remain stable as will the calciums pH once you dial it in, so how would a pH controller do anything if these pH values don't shift? So I called Mark to ask him what he needs to use a pH
controller for. His answer was that he pumps the CO2 very aggressively into the reactor which will lower the pH down below his pH controller setting of lets say pH 5, the controller shuts off the CO2 flow, the reactor pH value slowly rises to lets say 7.2 pH, then the pH controller turns the CO2 flow back on.
This is the only way I see that a pH controller would be of any use, but you do use a lot of CO2.
Jeff"
(Life Reef Filter Systems)
Anybody want to buy a bottle of Bubble Counter fluid?? :lol:
LL