Problem getting 6.5 with Cal Reactor

[boxer385]

Using the sms122 and can't get to 6.5 or 6.7 my is staying at 6.9
media won't dissolve at that p.h using ARM? What should i do?

[Eel-byte]

Taken from http://www.melevsreef.com/calcium_reactor.html

* ARM dissolves at a pH of 6.5, while other products such as Schuran media needs to reach 6.2 before it will dissolve.
* To increase alkalinity in the effluent, either slow the effluent rate even more, or increase bubbles per minute.
* To decrease alkalinity in the effluent, allow more effluent to exit, or decrease bubbles per minute.
* Any changes or adjustments you make should be tiny ones. Test your tank the next day to see how the parameters are currently. Try not to overreact. You can fine tune the system gradually over several days or even weeks.
* It is very important to check the effluent tubing daily to make sure it is dripping or flowing at the normal rate. It can clog up, and if water cannot exit, the pH can potentially drop within the reactor to the point of causing all the media to melt down at once. Check the bubble counter as well.
* Clean the pH probe if you use a controller, and calibrate it every six months.
* Every six months, clean the reactor out well, clean the feed and circulation pumps and the tubing. Replace the media.
* Have an extra tank of CO2 ready, so when you run out you'll be able to swap tanks out immediately. Refill the empty tank at your convenience.

[bimmerzs]

Measure the alk of the output effluent to see if it's higher than the tank's level. If higher then the media is dissolving and you may have a measurement issue.

Cheers,