The Planted Tank Forum - View Single Post - Do you run CO2 all day or partially?
View Single Post
Old 02-10-2013, 04:31 AM   #5
Darkblade48
Moderator
 
Darkblade48's Avatar
 
PTrader: (3/100%)
Join Date: Jan 2008
Location: Toronto
Posts: 8,733
Default

Quote:
Originally Posted by greenaqua View Post
I just setup CO2 on my new tank. Do you usually run this all day or only when light is on? my tap water is 7.4, I just ran for few hrs today and now my tank is 6.8
Quote:
Originally Posted by Dx3Bash View Post
On 30 min before lights on. Off 30 min before lights off.
+1. I do this also.

Quote:
Originally Posted by greenaqua View Post
If I keep it all day, will it have a stable PH and how low can of ph can it get?
Injection of CO2 can only lower pH to a certain value (I forget the precise value at this time).

Quote:
Originally Posted by greenaqua View Post
If I keep only when light is on, how much swing in ph should I expect? and will this swing affect small tetras (Neon, Rummynose) and cherry shrimps?
In general, pH swings that are caused by CO2 will not be harmful to livestock.

Rather than watching your pH, I would recommend that you use a drop checker with a 4 dkH reference solution so that you can first ballpark the CO2 levels you have, and then monitor your livestock carefully from there to see if you can increase (or you may have to decrease) your CO2 levels.
__________________
Anthony

A Primer to Pressurized CO2 and A Primer to Planted Tanks
Eheim Pimp #362 - Eheim 2213 x2, Eheim 2028, Eheim 2217, Eheim surface skimmer and Eheim autofeeder.
Victor Pimp #33 - HPT272-125-350-4M
Darkblade48 is online now   Reply With Quote