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Water change tips for 50 gallon new tank

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Wanting some advise/tips on water changing process for almost 50 gallon new tank (for 2 fancy goldfish). Just upgraded my 15 gallon to 50 gallon and now I'm thinking what will be the easiest way to do water changes, because the tank 3x bigger than my old one and we used to for changes with buckets but I kind of think it will be a bit difficult now. 

Do you guys use like Phyton or Lee's ultimate gravel vac (I heard to create vacuum will waste tap water, can user give advise on this)? Or use a bigger buckets (but then how to lift/refill 50L water if doing 25% water change)? Is there a better way?

Also now that the tank is much bigger for the two fancy goldfish, will I still do weekly 25% change or check water parameter first for first few weeks to see if I might be able to do fortnightly or so?

I'm actually upgrading to make more room for the fish and also hoping for easier maintenance (because people said it will be easier with bigger tank), but then now think will it be even harder to maintain the tank.

Any advise will  be appreciated.

Regards.

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The larger water volume will definitely be more stable in terms of parameters.

If you used to do 25% weekly change on the 15 gallon tank, and you're now putting the same fish in a 50 gallon, you would not need to do the same water changes.  Of course, if you give in to the temptation to add more fish....

Another option to consider would be 12.5% weekly - that's 24 liters, or 3 buckets, each week.   That's what I used to do years ago when I had a tank that size.

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16 minutes ago, MFF said:

The larger water volume will definitely be more stable in terms of parameters.

If you used to do 25% weekly change on the 15 gallon tank, and you're now putting the same fish in a 50 gallon, you would not need to do the same water changes.  Of course, if you give in to the temptation to add more fish....

Another option to consider would be 12.5% weekly - that's 24 liters, or 3 buckets, each week.   That's what I used to do years ago when I had a tank that size.

Thanks for your reply. I actually used to do 50% water changing weekly for the 65L tank I have, because I feel like its too small for those two.

Thanks for your advise, I might have to watch the parameter and also calculate how much I should change now that its bigger tank, with same amount of fish as per your suggestion.

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