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Old 11-08-2005, 10:29 AM   #1
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Cheap Airline tubing?

hey guys, i just have a quick question:

Since i've started my DIY CO2 kit, I've noticed the air tubing that is used with it has gotten stiffer, and is now opaque. It IS "aged" air tubing. probably over 5 years old... but at least it was clear. Now its a whitey yellow.

Is this normal/bad?

FYI... Got my 44 gallon lightly cycled. I put 2 neons and a cherry barb! No ammonia, No nitrites 2.5 (approx) nitrate. PH is 7.2, GH is 10, KH is 5-6

I think i want a lemon drop or some austrialian rainbowfish. I'll put my neons back in my 10 gallon, and move my loach over, (assuming i can ever catch him! *anger*)
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Old 11-08-2005, 11:47 AM   #2
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It's the acid that results from the CO2 and the humidity. Standard airline tubing will be affected this way. I believe the more expensive silicone tubing will not be affected. I've been running my CO2 DIY with the cheaper tubing, and it doesn't seem to be a problem that the tubing has turned opaque.
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Old 11-08-2005, 02:33 PM   #3
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Many of the retailers who sell pressurized CO2 systems also provide CO2-resistant tubing. I got some with my system and have had no problems with discoloration or stiffening (although the tubing was pretty stiff to begin with). It isn't cheap, but if it's a problem for you check out www.aquatic-store.com or www.aquariumplants.com. I believe they both carry it.
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Old 11-08-2005, 02:46 PM   #4
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yeah, i was just looking at that!
I know someone who works in a hospital, i'm going to see if i can get the silicone surgical tubing. I imagine that stuff could withstand nuclear winter. New tubing, of course

G2g look busy at work!
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Old 11-09-2005, 10:21 AM   #5
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The thing about silicone tubing, is that it's more porous, and will alllow some CO2 to seep right through the walls. not a big deal on DIY, but pressurized you'll notice a loss.
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Old 11-09-2005, 10:37 AM   #6
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hmmmm... I added the first bottle to my new 44 gallon. its not NEEDED yet, but i tested the water and its doing practically nothing. I'm definately going to have to use 2, even 3 bottles. its been running for 12 hours, i get about a bubble every... 2 seconds, right into my power head. I think its absorbing well, because the bubbles are almost non-existant by the time they hit the surface.

If my calculations are correct, i have about 11ppm.

I'm waiting for my new lights to come in SHOULD be here by friday, which probably means monday :-(

The light that came with it is a 18 watt florescent. Ghetto. I have a hornwort planted that goes right up to the surface... i THINK the very tip might actually be growing... but i'm certian the watersprite will die if i don't get it within a week.

I added my 2 inch clown loach yesterday. He didn't take to well at first, Darting around everywhere. I think he upset my cherry barb, as its running up and down the glass about 30% of the time now, rather frantically. :-S
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Old 11-09-2005, 01:47 PM   #7
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What's your pH at?
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Old 11-10-2005, 12:25 AM   #8
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PH = 7.2.
KH at 5-6 degrees.

just over 10ppm CO2.
That was as of this morning (12 hours with co2 bottle in) I'll test again tommorow morning.

the fish have seem to calmed down. The loach is still pretty uneasy. Doesn't have too many hiding spaces... (1 hiding space total)

Waiting for my driftwood to come :-|

I fed him a spirulina algae tablet. he gobbled it up. Pushed it into a corner and gaurded what he didn't eat right away. Clever bugger
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Old 11-10-2005, 08:33 AM   #9
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You must have had really alkaline water to start with!
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Old 11-10-2005, 09:11 AM   #10
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Actually, oddly enough, the PH hasn't really changed!
the tank is just estabilishing itself now. I have 40 pounds of eco-complete, 25 pounds of generic coated pebbles. I have about 4 pieces of red lavarock from my 10 gallon.

THe CO2 bottle has been in there for 36 hours now, i get about a blast of bubbles every... 5 seconds. (fed into my powerhead) PH is 7.2 still, and i seemed to have misplaced my KH test *annoyed* I imgine it hasn't changed from yesterday as well.

Looks like the single bottle can only provide me with 11ppm of CO2. 2 bottles running full time should keep it at an even 20ish! (in theory)

How much CO2 is usually absorbed by natural methods, without CO2 injection?
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Old 11-10-2005, 10:13 AM   #11
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Quote:
Originally Posted by sudz
How much CO2 is usually absorbed by natural methods, without CO2 injection?
Depends on the ratio in your air, and how much other stuff is already dissolved in your water. The water will absorb gasses from areation at about the same ratio as it exists in the surrounding air. Many methods that hyperoxygenate water will also add CO2.

I have run CO2 in the past, (10 and 20 gallon setups) but so far my new 75 gallon is more nitrogen limited, with a bubble wall in the back being the main circulation unit in the aquarium, and no supplimental CO2.

I have to start researching fertilizer now. I'm stuck at 0 nitrates with only a little more than 1 WPG. ...Or maybe I just need to remove the hornwort now that the tank is established.
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Old 11-10-2005, 11:11 AM   #12
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Quote:
Originally Posted by dskidmore
. ...Or maybe I just need to remove the hornwort now that the tank is established.
I have hornwort... why would you have to remove it?
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Old 11-10-2005, 12:08 PM   #13
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Quote:
Originally Posted by sudz
Quote:
Originally Posted by dskidmore
. ...Or maybe I just need to remove the hornwort now that the tank is established.
I have hornwort... why would you have to remove it?
You might not have to, but I may. I'm trying to grow up some of the more attractive plants, and my nitrate is stuck at 0. Unless I want to start fertilizing, I need to get rid of the fast growing hornwort that is likely sucking up all my nitrogen.

Hornwort is great for absorbing nitrogen compounds, or giving shy fish a thick mass of plants to hide in. I'd encourage you to keep it if it's not causing you a problem.
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Old 11-10-2005, 03:21 PM   #14
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The only thing thats kinda going "fishy" with my tank atm is i'm getting a bit of a coating on the surface, and a massive amount of bubbles. It is a mess though, as i have hornwort and watersprite all along the surface, to get maximum light to grow nice and big for my 44 gallon (as soon as my 96 watt kit comes in)

That wouldn't be related, would it? I'll take a picture tonight and post it. I'll probably start a new thread. ALMOST looks like a bubblenest, but i don't think i have any fish that do that :|
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Old 11-10-2005, 03:22 PM   #15
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.... zero nitrates = less water changes, right?
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Old 11-10-2005, 10:00 PM   #16
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Quote:
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.... zero nitrates = less water changes, right?
There are other reasons to do PWC. There is more than just nitrogen going into your system, more than nitrogen needs to come out.
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