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Old 05-03-2006, 08:07 AM   #11
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chlorine or chloramines from the water change? Ammonia or nitrite in the tank? These can cause red gills. I have to confess, every now and then I will look at a danio and say, wow, those gills are red, and the next day it is normal. I have not found an cause to this. I recommend looking for a correctible cause before assuming that your danio is just "blushing." Especially since it is a relatively new and smaller tank.

An airstone dramatically increases the tanks effective surface area, since all those little bubbles hitting the surface add up to some seroius area. Sure, they look too tiny to make a difference, but there are a lot of them and thier surface area is that of a sphere, which is (oh god, what is that formula.... ) 4pi R squared? So the surface area increase even with little bubbles is significant. It doesn't matter what the bubbles are composed of either, they all will help drive off CO2 and increase 02. If you bubble CO2 in too fast, as in the airstone situation, it actually lowers CO2 to the atmospheric equilibration level! That is why CO2 injection uses those bubble reaction chambers to increas the time the CO2 is in contact with the water, and reduce the surface agitation by CO2 bubbles. And bubbling in CO2 through an airstone will also raise the 02 for the same reason.

So, the primary effect of an airstone on dissolved gasses is via its effect on surface area / agitation. Normnal surface area/agitation by your filter outflow is usually enough to saturate your water with oxygen and bring the CO2 down to equilibrium with the atmosphere, so that an airstone is usually not needed, except for decoration. However, unless you are adding CO2 to your tank, airstones don't hurt anything either.

BTW- I don't use airstones in my tank. I do, however, use them in my holding tank. I havent used dechlor in a year, since the little airstones can drive off the chlorine in 12 to 24 hours.
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Old 05-03-2006, 08:52 AM   #12
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I don't have a stone and it works out just fine. Frogs don't like airstones.
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Old 05-03-2006, 09:49 AM   #13
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Yesterday was just full of problems!!!!For some reason NOW the filter keeps quitting, something that is going on with the power in this room only, danio turned back to normal color by the next morning. In answer to one of the questions I have done water change
1. 4 weeks after putting new fish in tank
2. 4 days after putting in medicine for tail rot (which was only 10 days after first water change)
3. And again when I put the bubble wand in (that's is why I waited to put it in)which was approx 4 weeks after last change.
I will say though I do not think that I did a thorough job with the syphon the first time because when I did it the second time and really really moved the stones around there was tons of gunk going up the syphon.
Now my new problem is my molly, she is swimming with her tail down, almost like standing up, any ideas. I am getting a test kit today so I will be able to give more info that you need to help me. Thanks for the help so far though.
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Old 05-03-2006, 11:06 AM   #14
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Its not the bubble wall. No, you cannot have too much air (oxygen) in an aquarium.

You definitely need test kits, and to stop getting advice from that LFS. Apparently they want you to fail at first, and buy more fish, since those are a better markup on price, vs. a master test kit they probably make $1.25 on.
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Old 05-03-2006, 01:12 PM   #15
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Once you get a test kit, will know if there are water quality issues, which is probably the case if you have only done PWC 3-4 times since setting up the tank. In smaller tanks, water quality issues can more quickly affect your fish than in a larger tank. You need to increase the PWC to weekly--removing and adding 2.5 gallons will not take long. This will also allow you to vacuum more often and the gunk (waste) will be removed, which will help keep the tank's water quality tip top until the next PWC.
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Old 05-03-2006, 08:10 PM   #16
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A good water test kit is the AP Freshwater Master Test Kit, for example, this one: http://www.aquariumguys.com/mastertestkit.html
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Old 05-03-2006, 09:22 PM   #17
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I put a air wand in my tank when I set it up for the first time...just for the look of it.

It was too much air for my liking...and probably to much current too...so I bought a gang valve and diverted some flow away from the wand and into the room.

Worked well.For two bucks I still had some bubbles,but I had control over how much "curtain" I had.

Now for those results.....
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Old 05-05-2006, 05:50 PM   #18
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Ok had my water tested at the pet shop, (they did not have the 5 in 1 test strips in) that I need. But the only one that was high was NITRATE. It was supposed to be white and mine was hot pink.!!!!!!! I did a 40 % water change like they advised, but Menagerie says PWC once a week now I have a evaporation that happens quite quickly in my tank and I don't know why but after a week the water will be down already 2-2 1/2 inches by that time so you say 2.5 gallons but does that include the evaporated part. That is why in my first water change after the first month I only syphoned a small bit because to only take 1/4 away altogether I didn't have much water to take. If this makes sense, please advise me!!!
Would all of what has happened in the last week make my molly swim kind of like it is standing up, tail down and kind of rocking back and forth like a boat???
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Old 05-05-2006, 06:08 PM   #19
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if I am not mistaken you guys are wrong, for planted tanks many AA members found out that the plants were taking all the o2 away from the water thus making the fish die or trying to get some air in themselfs. the cure for this is an air pump running at night. please don't quote me but do research under aqauscaping and planted tanks. having said that then that means air pumps do work.
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Old 05-06-2006, 04:52 AM   #20
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kaz is right. At night plants go from producing o2, to competing with fish for 02. in my heavilly planted 35 gallon cube, I lost a bunch of fish to hypoxia one night. (only lost the ones sensitive to o2 loss and lost them all at once)

I started running an airstone at night and I have had no more die offs.
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