How to control PH at night ?

[Casey8]

I have a problem to keep PH at night. I have been trying to drip Kalwasser, it really helps the PH not to drop too low, I can say it is almost perfect like in the day time. But the problem is, my KH is getting to high if I dose every night. I mix 5 table spoons in 5 gallons and keep filling it up with water for another 3 to 4 days maximum. I threw away the left over at the bottom. How do you guys control your PH not to drop at night ?

[reefwars]

you can run a refugium and allow photosynthesis to occur at night while the display is dark.....theres usually a difference in night and day with ph, i wouldnt be adding anything unless its a drastic swing , how much are we talking?? what are you testing with??

[reefwars]

dosing kalk will affect your alk if the calcium isnt getting used up fast enough.

[Casey8]

There is no chance for me to turn on the refugium light at night because the sump I have set up is beside my tank and it is located in my bedroom. Is it any alternative that I can control it ?

[reefwars]

Originally Posted by Casey8

There is no chance for me to turn on the refugium light at night because the sump I have set up is beside my tank and it is located in my bedroom. Is it any alternative that I can control it ?

what are the readings ranging from?? its acceptable to drop a bit during the night and then raise in the morning/afternoon.

are you using a probe to get your readings?

[Casey8]

I am using the cheapest API to test PH. Day time is showing dark purple 8.3 but only 7.5 light pink color around 7AM. None of my fish show sign of distress but I don't like it.

[syncro]

Some more info on pH here:

Reef Aquarium Water Parameters (Randy Holmes-Farley)
http://reefkeeping.com/issues/2004-05/rhf/index.php


Some options for control:

Chemistry And The Aquarium: Boron In A Reef Tank (see pH Stability section)
http://www.advancedaquarist.com/2002...try#section-14

[reefwars]

haha dont supposed a hrv is out of the question im guessing the swing is because this tank is in your bedroom and theres not a whole lot of fresh air coming in i think during summer youll find you wont be having these swings as drastic. is it a reeftank you have?? if so unless theres any drastic change in your corals appearance i wouldnt worry about my ph to much i would just get my alk back to where its supposed to be once that stays consistent i think youll find your ph will balance out.

[Casey8]

I have never thought the difference between bedroom and season ... haha ... I think you are right about it, it looks like the PH drops more in the winter time All my sps corals and fish are fine, no showing of any distress at all. I think I am just worrying too much. Thanks reefwars.

Thanks syncro, I think I have to take my whole day off tomorrow to absorb all the chemistry stuff ... phew ...

[reefwars]

theres def alot of things that come into play its best not to mix things up to much sometimes you need to look at everything as a whole.... focusing to much attention to one particular thing distracts you from the whole picture


it is a bit of a swing but if its not affecting your coral then id drop it and get your alk back to normal.