How to have enough warm tap water for aquarium?

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aquariumpredatorkepper

Black Skirt Tetra
MFK Member
Feb 10, 2021
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I have my 3900L aquarium perfectly setup, filtration is a big sump with plenty of media but only problem I have is water changes! I do not have enough warm tap water to do even a 25% water change... I like doing 50-75% WCs but on this tank it just does not seem possible. My tap water is like 10-15 celcius after I use all the warm water. What should I do? Can someone reccomend me something?
 
Your options are going to be regionally influenced. What country are you in and what part of that country if it's a big one (such as the U.S.). Since you listed your tank in Liters I'm assuming you're not in the US. Therefore you're options are likely different than mine.

I'm in Charlotte, NC and my outside air temperatures vary widely based on the season. Therefore the temperature of the "cold" water feeding into my house is much colder in the winter. Thus it requires more "hot" water to balance at my desired 78*F (25.5*C). If this is the same for you, then in the summer you'll likely be able to do much larger water changes but in the winter you will be restricted to smaller ones.

Alternatively you could explore an auto water changer... Or fill a water storage container, heat it to temperature, then use it to refill after a water change... Possibly a larger water heater... possibly a tankless water heater to provide hot water on demand.
Also consider a refugium that can lower your need for large water changes.

3900L = 1,030 gallons. That's a lot of water. Congrats on having such a large tank it's creating unusual problems.
 
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You could install an inline water heating system which heats water as it travels through the system vs storing hot water in a tank. Theres gas & electric versions.
Something like this;

IMG_6876.png
 
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When I lived in Wisconsin, my tap water was about 50´F (10¨C) and even colder in winter , originating from Lake Michigan.
I found my best recourse for water changes was to do smaller more frequent ones. By doing a 30% to 40% water change every other day I could change almost 100% per week. And just in case I lost track of time, ended up with a cold splash, I always added new water to the sump asopposed to the main tank.

Even though these days living in Panama, there is no need to heat water at all. I find that same regime works well,
and my nitrates remain undetectable.
IMG_9456.jpeg
 
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