Water flow device

[jojo3367]

Hi,

Probably this is a bit overthinking, but I thought to buy a water flow device that connects into your hose and would measure how many litre I pumped out from aquarium during water change.

Does anyone use something like that?

Thanks,
Mike

 

[Little]

You can just measure the distance the water line drops.

 

[hypnogogia]

You can just measure the distance the water line drops.

Indeed, just work out how many litres each 1cm drop equates to, or do it in percentages in relation to the depth of your water.

 

[ian_m]

I marked a line on my tank, using a Sharpie that was 90 litres down (on 180l tank).

Calibrated by using a 2 litre jug to remove 20 litres of water, noting the tank level drop and multiplying the line drop by 4.5, to get 90l. Put a bit of Scotch tape over the top of pen line so it won't rub off during tank "faffing".

I then syphoned water out until the line was reached. Job done.

 

[bazz]

I marked a line on my tank, using a Sharpie that was 90 litres down (on 180l tank).

Calibrated by using a 2 litre jug to remove 20 litres of water, noting the tank level drop and multiplying the line drop by 4.5, to get 90l. Put a bit of Scotch tape over the top of pen line so it won't rub off during tank "faffing".

I then syphoned water out until the line was reached. Job done.

Similar, but I have a 130l premix container of which I first filled by syphoning out of my full tank when full and new (leak test) and marked the level with a Sharpie. Now it is syphon off to mark and pump back prepped water, job done.