Ph - Page 2
Tropical Fish

Tropical Fish Keeping - Aquarium fish care and resources » Freshwater Fish and Aquariums » Beginner Freshwater Aquarium » Ph

Ph

This is a discussion on Ph within the Beginner Freshwater Aquarium forums, part of the Freshwater Fish and Aquariums category; --> Originally Posted by MoneyMitch you have this revers, ph lowers not raises :P Actually it works both ways. raising pH lowers co2 lowering co2 ...

Check out these freshwater fish profiles
Croaking Gourami
Croaking Gourami
Discus
Discus
Reply
Old 04-08-2013, 04:00 PM   #11
 
Quote:
Originally Posted by MoneyMitch View Post
you have this revers, ph lowers not raises :P

Actually it works both ways.

raising pH lowers co2

lowering co2 raises pH.

With planted tank I emphasize the later. As the plants lower the co2 the pH rises. Just as adding co2 lower pH.

for the really nerdy:

CO2 (atmosphere) + H2O <->H2CO3
H2CO3 <->HCO3- + H+
HCO3- <->→ CO3-- + H+
beaslbob is offline   Reply With Quote
Old 04-08-2013, 04:05 PM   #12
 
MoneyMitch's Avatar
 
if you notice some plants will use CaCO2 as a carbon source which has a direct impact on your kh which in turn effects your ph. the more caco2 the plants use the more your kh will lower in a result of a lowering ph. the naturally occurring co2 in a tank is minimal and the built up stores are used within gthe first few hrs of light on. the effect of naturally occurring co2 on ph in a aquarium is minimal. about the same as the plants using the caco2.

*shrug*
MoneyMitch is offline   Reply With Quote
Old 04-08-2013, 04:15 PM   #13
 
Quote:
Originally Posted by MoneyMitch View Post
if you notice some plants will use CaCO2 as a carbon source which has a direct impact on your kh which in turn effects your ph. the more caco2 the plants use the more your kh will lower in a result of a lowering ph. the naturally occurring co2 in a tank is minimal and the built up stores are used within gthe first few hrs of light on. the effect of naturally occurring co2 on ph in a aquarium is minimal. about the same as the plants using the caco2.

*shrug*

Agree

except that with a heavy fish load there is significant co2 in the water.

And I remember seeing one analysis by dr randy holmes farley that plants actually return carbonate to the system as they reduce nitrates to plant tissue. And in the same amount the aerobic bacterial used up the carbonate (alk).

From the same article the anaerobic /anoxic bacterial also add carbonate consuming nitrates.

My observation is that even with peat moss in the substrate I have a pH of 8.4-8.8 (api high range test kit) in my tanks.

my .02
beaslbob is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -5. The time now is 02:50 PM.