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Is there a sticky somewhere with the monthly meetings/hosts for 2015? I don't see one in the announcements forum.

What Atman pump is it? If it does have the mesh type impeller, and the spacers don't work, you can get a pinwheel replacement impeller.

I am a big fan of Sea Side Aquatics. Basically a Bubble Magus using a better Sicce PSK pump.

When you replaced your DI resin, did you tamp it down in the cartridge, tightly compacting it? If not, you may be getting some channeling through it, giving you a reading on the output.

What salt mix are you using? What is your SG? What are you using to measure it with? With a reading of 1100 on your Mg, I'm a little suspicious of your SG.

Here's another take on it: http://www.advancedaquarist.com/blog/how-i-beat-dinoflagellates-and-the-lessons-i-learned

plus 1

Welcome aboard, comrade.

This can be true, but it is almost always on the alkalinity side that there seems to be an excess demand, not the Ca side. One example would be where some animals will incorporate a cetain amount of Magnesium or Strontium in place of Ca, changing the ratio to ~ 18 ppm Ca to 50 ppm alk, using...

Saturated kalkwasser also contains this same ratio, @ ~ 800 ppm Ca(2pts.) to 2,000 ppm CaCO3(5pts.). It also has the added benefit of utilizing some of the CO2 in your system, which may help keep your pH in line. So, we still have the same dilemma, since using kalk is a good supplement of both...

Are you adding any type of pH buffer? The uptake of alk and Ca in any system, including normal calcification and abiotic precipitation is a ratio of 5 parts of Alk to every 2 parts of Ca, or 2.8dKH(50ppm) to every 20ppm of Ca. If you include the fact that there is less alk in reserve to begin...

I ran them for several years without a problem. But, like anything in this hobby, they have to be set up/deployed properly.

Think of it this way, If it had said Aquarium, it would have cost $1,000.00. :rolleyes:

The easiest thing to try, without having to add any equipment, would be to use some form of carbon source, i.e. vodka or vinegar. Here and here are good articles if you haven't already seen them. What are you using to measure your PO4? If it's as low as your post indicates, you may want to take...

Everything looks great, Joe.

This may be helpful: http://www.advancedaquarist.com/2002/5/aafeature

Thank you Tommy and Kristin for hosting and generosity. It was good to see some old (meaning long time) friends, and meet some new ones. Chris walked home with the gold, he may be running a close second to Anthony(Raffle King).

Welcome aboard.

+1 Did mine, and didn't skip a beat.

https://www.facebook.com/AMHQonTWC/videos/1015483201815510/