Water changes; 30% daily vs 75% weekly, what's better overall?

[Barry Tetra]

So as the title saids, 20% daily water changes and substrate clean Vs 75% weekly and substrate clean?

Thoughts?

@Colin_T

 

[kwi]

Simple maths tell us if you don't change over 50% of the water at anyone time the pollution will continue to rise faster than if you do.

 

[seangee]

Simple maths tell us if you don't change over 50% of the water at anyone time the pollution will continue to rise faster than if you do.

Applying that simple arithmetic
You have 100 units of tea. Every day you replace 20 units of tea with water for 7 days.
At the end of 7 days you still have 21 units of tea.
Change 75 units and you have 25 units of tea left.

Sounds good so far. Now lets say your fish produce 10 units of tea. By the end of the week you are left with 60 units of tea. Feel free to check the arithmetic.

Now as an exercise , what would happen if the fish produce 21 units of tea per day?

 

[kwi]

If your fish do one poop a day on day 7 after removing 20% of the poop each day you have 3.1611392 poops left.
On day 7 after doing a 75% change you have 1.75 poops left.

 

[Colin_T]

Unless you have nothing to do and water is free, I would do a 75-90% water change once a week. I have better things to do (like sit on my asss) than do water changes every day.

 

[AdoraBelle Dearheart]

Unless you have nothing to do and water is free, I would do a 75-90% water change once a week. I have better things to do (like sit on my asss) than do water changes every day.

You have a delightful way with words

 

[Aussie_Bristle]

Unless you have nothing to do and water is free, I would do a 75-90% water change once a week. I have better things to do (like sit on my asss) than do water changes every day.

um mah you said a swear word! You’re going to get reported now

 

[Colin_T]

um mah you said a swear word! You’re going to get reported now

wont be the first time

 

[AilyNC]

Water is free here but I never want to go back to daily water changes

Edit typo​

 

[Barry Tetra]

The thing is the other day one of my clown knifefish died because of
the loose filter plug that kinda unplug itself

Nitrate is about 100+ I have done 90% and now trying to do 30% daily just incase of filter plug things happen again

 

[Barry Tetra]

Applying that simple arithmetic
You have 100 units of tea. Every day you replace 20 units of tea with water for 7 days.
At the end of 7 days you still have 21 units of tea.
Change 75 units and you have 25 units of tea left.

Sounds good so far. Now lets say your fish produce 10 units of tea. By the end of the week you are left with 60 units of tea. Feel free to check the arithmetic.

Now as an exercise , what would happen if the fish produce 21 units of tea per day?

Oh no! I hate math, I have been studying math for about 40 days straight now, ya know Asian math test, they are like hell.

 

[AilyNC]

Secure the plug better in place.

 

[Barry Tetra]

Secure the plug better in place.

Already did that, I just don’t trust my filter plug anymore (and a little bit of ocd) so that’s why I’m trying to do 20-30% daily.

 

[Colin_T]

Put a second filter on the tank. It's unlikely both filters would come unplugged at the same time.

 

[jonnyc88]

It’s been mentioned to me in a fish keeping FB group I’m in that daily water changes will shock fishes and potentially kill them.
What are your thoughts on this?