How Long To Wait When Adding Conditioned Water (Partial Change) &

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Stratus

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Hi, everyone!
 
I'm currently working on getting my ammonia level down from 0.5, and would like a bit of help when it comes to partial changes. For a little background information on me and my tank, you can read about it here (including the latest levels).
 
It was suggested in my introduction post to do a 50% water change as well as getting some media. I am planning on getting some mature filter media from my uncle tomorrow (hopefully!). But tonight, I have started on the process of doing a water change. I'll get to the media down at the last paragraph.
 
The tank is 5.5 gallons and contains a cute little (1 1/2 inches) Comet goldfish (yes, a BIG tank upgrade is coming ASAP!), and I will be changing 2 gallons worth. I added around 2 ml of water conditioner, and it is now sitting in the 5 gallon bucket specifically kept for water changes.
 
I put the conditioner in over 20 minutes ago, agitated the water gently, and have let it sit. Usually with my past fish, we let it sit for 24 hours, but I've heard that some only wait a few minutes to a few hours? It's been a few years since I owned fish (and my mother was the one who changed the water), and I'm learning so much more than I ever knew, which is why I want to double check that I am doing everything correct and even better than before.
 
I searched the forums to see if there were any topics about the duration of letting fresh conditioned water sit for a partial change, but I couldn't seem to find it. I am still new, so I could have missed a post about it as I learn my way around the forums - for which I apologise in advance - though I did read a few on general water changes when I searched for it.
 
Also, how precise does the water conditioner amount have to be; is a little over or under going to be a big effect? I was as accurate as possible about filling up the bucket and adding conditioner. I used a measuring cup that equaled to 1 quart right at the rim, added 8 quarts, and then the conditioner. I don't think it needs to be exact, but you guys are the experts.
 
Now for the filter media. To be honest, I've been doing a lot of research learning what it is and how to transplant it from one to another. From everything I've read on this forum, it's basically everything in the filter cartridge. In my tank, I have the cartridge and a thin black sponge for the filtration; does the black sponge also count? My uncle has a tank that's a few years old with some long lasting fish. Lately, his has a bit of algae on the glass but it's usually clear. I just want to make sure taking some of his filter will not cause any issues with the algae (though I do have a Marimo "moss ball" in my tank). Also, what would be the best part of the media to take from his filter media; opening up his cartridge, cutting some of the sponge (as I assume he has something similar)? I know you can take as much as 1/3rd, but my tank is much smaller than his. I don't want to damage either aquarium/fish, and I sure don't want to guess, so advice is much needed :)
 
Thanks so much for the help, everyone. 
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i have never waited, i add my conditioner, stir it and add straight to the tank. 
Ive never lost a fish this way in my years,
Also some people with huge tanks use a hose pipe to add water to the tank, with the filters off to stop the fresh water going into the filter, and then dose for the whole tank.
 
Most conditioners state its better to add to the aquarium but can be added to buckets, for example Seachems Prime (best in my opinion) says best directly added to tank but can be used separately. 
 
paradiddle said:
Most conditioners state its better to add to the aquarium but can be added to buckets, for example Seachems Prime (best in my opinion) says best directly added to tank but can be used separately. 
 
I would argue that they probably state that so that you use more of it up and then have to buy more! Who does that help? The tap safe makers or you? :)

I have been adding conditioner to my buckets for over 20 years with no issues so I think you'll be pretty safe to do this. I put it in the bucket, fill up with water and then pour it in the tank. Simple!
 
There's no real need to wait as your dechlorinator should work pretty much instantly.
There are two reasons for letting water sit in a bucket for hours.  Mostly it's a throwback to when people would let the chlorine 'gas off' from the water, which takes about 24 hours.  You're using dechlorinator so there's no need for that, also more water supplies have chloramines added these days and 'gassing off' won't get rid of chloramines.
The other reason is to allow dissolved CO2 in the water to dissipate.  This can stabilise your pH and help to prevent algae which would benefit from the dissolved CO2.  I wouldn't worry about it.  If you have algae problems then just turn the lights off for a couple of hours after a water change.
 
Thanks for all the help, guys! Now that I know it can be done pretty instantly, I'll be sure to do it. I like the bucket method, personally, because of knowing exactly what I have just in case I need to add more or subtract.

Thank you all again :)
 

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