Water Line question

[lovemybarbs]

I don't have CO2. Should my water line be higher or lower? I remember reading something about this, but it's been a while.

 

[Quartermain]

I can't imagine a reason why it would make any difference.

 

[lovemybarbs]

I remember something about the splashing hurting or helping, but I can't remember which.

 

["13"]

you mean about the oxygen exchange at the surface of the water ?

 

[lovemybarbs]

Yes. I think I remember that whichever is not recommended for a CO2 tank, it works the opposite for a planted tank with ferts only.

I'm just trying to get some help in my plant growth.

 

[soobie]

The surface agitation increases gas exchange, so if you are adding CO2 you don't want much splashing, since it off-gasses the CO2 too fast. If you're not adding CO2, it won't matter as much.

I keep my tank filled pretty full (above the black trim on the top), so my HOB filter won't make loud waterfall noises. Plus, I think it looks better that way.

 

[jmorris]

If you're not adding CO2, then surface agitation could actually be good since the increased gas exchange at the surface will actually increase the amount of CO2 in the water slightly, as well as ensure that the O2 levels will be sufficient with the lower plant growth/O2 production.

 

[lovemybarbs]

That's it!! Thank you! I couldn't remember. I'll lower my water level.

:dance2::dance2::dance2:

 

[Mgamer20o0]

even with it all the way up to the top you should get plenty of surface agitation.

the way i see it.... the higher the water the more room for plants/fish