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Topic Review (Newest First)
06-29-2003 12:30 PM
JamesHoftiezer I was just wondering where your KH is?
You can measure the CO2 if you know the KH and the PH of the water column.
If you crashed the PH overnight, its important to know the KH of your water. The KH will act as a buffer limiting the change in PH for the CO2 added.

I think hagen makes a $10 membrane diffuser that would be good for you tank. On DIY systems airstones are of limited use. The pressure from the yeast bottle is not usually high enough to get the fine bubbles out of it.
06-22-2003 01:08 PM
Buck Oh My Gawd Kelly ! Buck The Great ? Dont you know that drugs are illegal ? I dont know what you are smoking but that was tooo funny :lol:

As Wasserpest wrote you do also need to know your GH/KH to determine CO2 content.
If you dont want to buy that kit just bring a tap water sample to your LFS and ask them to test for them, normally they will do that for you. If you keep up on regular water changes you only need to really test for that once and it will keep you within your "known" ranges unless you have extreme water conditions that require buffering, then in that case , regular testing is necessary to be sure you have adjusted properly.
06-21-2003 11:39 PM
Wasserpest Just to add to what Buck already said...

Depending on how hard your water is, you need to be careful what you are doing to the pH in a very small tank like that. I am sure it can easily be overdone...

A long time ago, when reactors were not known yet, we used a little piece of a branch of a lime tree (Tilia), peeled off the bark, dried it, and stuck it into airline. This creates a stream of very fine bubbles, which mostly dissolve on their way to the surface. Just a thought if you don't want to uglify your 5 gal with a big plastic reactor and a 200 gal/hour powerhead

Since there were no CO2 measuring kits, we also measured the pH of tap water, then blew with a straw into the solution, which added CO2 and changed the pH. Then measured the tank water, and it was supposed to be in between the two first measurements. But I don't remember the details or scientific background... well that was when I was 8 or 10 years old :mrgreen:

Right now my mixture is 1 (big) cup of sugar, a little bit yeast (was never able to exactly measure 1/8 of a tea spoon), and warm water. This lasts for about 2 weeks, and for my tank I am using 2 bottles, and one of them is refreshed every week. I don't use baking soda, because I have hard water and I think the sodium would be poisonous to the yeast cells.

Good luck...
06-21-2003 11:37 PM
Work In Progress
Quote:
Originally Posted by Buck "The Great"
Without a diffuser or reactor you need to keep a CO2 pocket in contact with the water at all times for it to dissolve and become a factor.
Yes I forgot to mention this in my previous post.
My daughter gets these drinks at walmart that come in like mini 2litre shaped bottles. I cut the bottom off and drilled a small hole, similar to Rex's directions, then of course put it over the airstone, to catch the bubbles.

Now I have to get a ph test, ha ha ha...........
I own not one test kit! I feel so embarassed ops:

I will get it together eventually.
Will also update soon, if I can get my hands on a ph kit.
06-21-2003 09:08 PM
Buck If the PH is crashing then you are definately getting CO2 content in there.. *I missed that part.

Your PH will drop with CO2 content, thats how to measure. Just be patient and the results will come.
06-21-2003 09:05 PM
Buck CO2 is CO2 Kelly,
Its not the mix that controls your levels but how it is introduced to the water column that does. Without a diffuser or reactor you need to keep a CO2 pocket in contact with the water at all times for it to dissolve and become a factor.

I was never a fan of the airstone method because it simply puts out bubbles that float free to the surface and dissipate.

Being such a small tank Im not sure how you could do that, maybe a pill bottle suction cupped to tank wall ? :roll:
06-21-2003 08:48 PM
Work In Progress I started this DIY co2 on my 5gal..........
:lol: So far nothing. Come on, I want Jack and the beanstalk effect here, like overnight! :lol:

But seriously, could someone tell me what to watch for, besides using water parameters, so that I will know the plants are actually getting benefits from it.

Now I took it back to cave days here, so I am not using a fancy DIY reactor yet, since I have no powerhead and such. But it might be coming soon in the future. So picture, airline tubing, silicone, bottle, and airstone.
I am fairly positive I have crashed the PH in the tank too.
Ok don't laugh, this is the mix that I am using now
1/2 tsp yeast
1/2 tsp baking soda
2 cup sugar
7 1/2 cup warm water
------------------------------------------------
My friend suggested a smaller bottle and an adjustment to the ingredients.
Guess I am doing overkill right now Somehow I am not surprised, since I rarely get it right on the first go.
But hey I am trying!

Anyway any suggestions modifications and etc are welcome and appreciated

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