Low KH on the ARM.

[patrick123]

Hi,

I have been having problem maintaining my KH for the tank. I have a CR running 24/7. Even after I use the Seachem reef builder to boost up my KH to 13 dkh, after about 1-2 weeks, it will go back to 6-7 dkh. This has been the case for a few weeks already.

Today, I measured the effluent of the CR and got a shock that the KH for the effluent is only 11dkh. No wonder my tank can only be at 7 dkh.

The media I used for my CR is ARM. Just wondering if anyone has the same problem.

[lightningstrike]

wat is the ph of ur effluent and Ca in ppm?

[hamannbmw]

i'm using ARMs too, my kh from effluent is 49 (salifert test, borrowed), however my main tank is only 7-8dkh (mini labor), wonder if the mini labor test kit is accurate, jus bought a salifert test kit, will post results soon.

[patrick123]

Didn't measure the CA and PH from effluent since Ca is not a problem for my tank...I'm able to maintain 430ppm. What should be the correct reading on the Ca and Ph?

Hamannbmw,

Please let me know what is your effluent Kh and tank kh reading using the salifert. Thanks.

[ZeRoC00l]

You got to retune your CR...

I used to have low KH till i increase the bubble rate.

Perhaps you can state your CR model? bubble rate? effluent rate?

Fromw what i have comprehend so far: CR KH has got to be 40-60 to maintain your tank KH at ard 9+

Dun have to be so critical tt Kh MUST be 11, Ph MUST be 8.2, or Ca MUST be 420

As long as your corals are doing fine, just leave the settings.

[AlfaRomeo]

Bro, whats the Ph of your elluent? Drip rate? bubble count? most prob the Ph is too high... gotta run the CR at about 6.7 - 6.8 for ARM to be effective. Which CR are you using?

[hamannbmw]

jus did a test, my KH is 12 using salifert....., tats the problem with test kits , shows 7-8 using mini labor , i guess my tanks parameters is in porpotion now...

[patrick123]

Bro, whats the Ph of your elluent? Drip rate? bubble count? most prob the Ph is too high... gotta run the CR at about 6.7 - 6.8 for ARM to be effective. Which CR are you using?

I'm using the CR from cookie. Since I'm out of town now, I will go home and check the Ph of the effluent. Currently, the bubble count is 1 bubble every 2 seconds and the drip rate is 1 sec 3-4 drops.

Thanks,

Patrick

[RAV-65]

Dunno if its the case... but ur magnesium must be 1200ppm above... or else the kh might keep dropping very quickly...