Chronic low Ph

[marcrothschild]

I have a 100G SPS/LPS reef. A couple of months back I upgraded my lighting system, and my corals have exploded with growth. To keep up with the growth, I need to run my reactor harder. My Ph will drop to a low of 7.6, and has a high of 7.9.
SG 1.025 Mg 1300 Ca 400 Alk 8.3 Po4 0.03(Hana) NO3 0
My growth and color are great, so I guess I should not worry about it? I use about 120 BPM of CO2, and the house has great ventillation.
What do you guys think?

 

[reefnetworth]

do you use Kalk? that will rise the pH to acceptable level instantly. be careful not to overshoot. add slowly and in high flow area such as sump. one ml per 20 gallons to start. REEF-ON!!!

 

[Deuce67]

Another way is to aerate your CR effluent. Since you are a Z user, you prolly dont use kalk. I had the same problem too when I stopped using kalk. I built a little reactor for my CR. I manage to keep my tank at 7.9 to 8.3 without the use of kalk. If you already have a spare airpump laying around, it should not cost more than 10 bucks. Here is my CR reactor.

 

[marcrothschild]

I dont use Kalk any longer for a couple of reasons. Its a hassle to mix and drip, it precipitates all over the impellar shafts, and according to those who use Zeo it causes PO4 to be precipitated on the rock and sandbed (thus slowing its export).
That reactor looks like a good solution, what is the pH in the reactor body vs. comming out of the degassing chamber?
Do you guys think that the pH matters if Ca, Alk, and Mg are within normal limits?
Thanks, Marc

 

[Deuce67]

Out of my CR is 6.7 out of the first chamber, 6.9 out of the second and 7.8 out of the degassing reactor. I dont use kalk anymore either and all my pumps can go longer without maintenance.

 

[UFreefer]

So is that just a container where both your CR effluent and an airstone go into? Thats what it appears to be but just want to make sure. Great idea by the way

 

[Deuce67]

<a href=showthread.php?s=&postid=7459924#post7459924 target=_blank>Originally posted</a> by UFreefer
So is that just a container where both your CR effluent and an airstone go into? Thats what it appears to be but just want to make sure. Great idea by the way

Thats it.