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Discussion Starter · #1 ·
How many of you run an air pump at night after your co2 goes off? The reason I ask is we put a new canister filter on last night switching from standard HOB filters and this morning all our fish were breathing very heavy and resting on the bottom. I am assuming this is because we didnt have anything breaking the surface overnight and the oxygen levels got very low. Would running an air pump overnight be a good idea? Thanks again
 

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Get the timer to turn off your CO2 ~30 minutes before the lights go out. This will allow the plants time to use up the CO2 in the water.
 

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Get the timer to turn off your CO2 ~30 minutes before the lights go out. This will allow the plants time to use up the CO2 in the water.
This is the method I use. But I only do it 5 minutes before lights out. I run a Fluval 204 and the tank is heavily planted with no other surface agitation. I used to run the airstone before getting a solenoid. But with the solenoid, I have not had a problem.
 

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Discussion Starter · #7 ·
I do have a solenoid on my regulator but it is currently turning off with the lights. I will try changing it so that it goes off about an hour before my lights go off just to be safe. If I do this do you think i still need an airstone at night?
 

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I don't see why you would need one, unless your tank is severely overstocked, or your solenoid is not shutting off the CO2 completely. Have you checked that the solenoid is functioning properly?
 

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Discussion Starter · #9 ·
I turned the solenoid off this morning when i noticed the fish acting funny and i havent turned it back on. I just went under the stand and looked at the bubbles and it seems to be letting off a bubble about every two minutes. Could that small of a leak make that big of a difference overnight?. I just checked ph at 7.2 and KH around 7dkh giving me about 15ppm of co2 at this current moment. Fish are not breathing as hard but there is still little to no movement from them. They are just hovering around the bottom. I am thinking about doing a 50% water change.
 

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15 ppm of co2 shouldn't give the fish a hard time, so it's probally not the co2. A water change probally wouldn't hurt, but Im not completly sure of whats going on.
 

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Discussion Starter · #11 ·
unfortunatly I dont have an ammonia or nitrite test kits so I'm going to take a sample to the store and have them test it just to be safe. Also I changed my water and when I opened my bottle of prime it smelled like rotten eggs. DO you think it is still good or has it spoiled?
 

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Discussion Starter · #13 ·
A little update on the situation. Water tested ok at the store so its not ammonia or nitrite. I have add carbon to the canister filter and cut off Co2 and added a airstone till things clear up. Some more info, I never use hand lotion or burn candles or use air freshener in the same room as the tank. The heater isnt broken or full of water. I am beginning to think some sort of toxin is the cause of this. I will keep everyone updated. Thanks again for the suggestions.
 

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My tank is open top and I have the eheim lily pipe so when the co2 turns off I just raise the pipe some to agitate the water some. I use to run an airstone at night which was on a coralife timer that would automatically turn it on when the lights and stuff turned of but have removed it.
 

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Discussion Starter · #15 ·
Update 2/5/07 5pm: I think it might just be my rams because they are the only fish acting funny at this point. They are also the only fish that did not eat today so who knows.
 
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