Very approximate evaporation rates?

[nphsmith]

I will be soon receiving my new 90*50*50 cm(230L) open-topped tank. Water movement will be via an Eheim 600T, 1800LPH, through 75 cm of spraybar mounted about 5 cm under water level. Lighting will be Maxspect razor at 30-45cm above water level, so should not produce undue heat.

Can anyone give me a very vague guesstimate as to evaporation rate per week?

I have to make a decision between a 10litre or 25 litre RO container for auto-topup - I would prefer the 10L but not if I am going to have to change during the week.

 

[foxfish]

Do you mean you have a ball valve auto top up & want to connect that to a RO unit fed from the mains?

 

[nphsmith]

No, I'm going to manually put to in one of these - Reefloat - Innovative automated aquarium products - Auto Top Up Units



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[nphsmith]

No, I'm going to manually put to in one of these - Reefloat - Innovative automated aquarium products - Auto Top Up Units



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[foxfish]

A vague guesstimate ... one litre a day, is there a reason to use RO water?

 

[Yo-han]

With a surface of 120 x 60. 24 degrees Celcius and a room temp of 20, my water drops about 1,5 cm average in a week, so 10L. I think the guess of foxfish of 1L will be really close!

 

[Ichthyologist]

Agreed.. 1 liter per day at this time of year. I find slightly less in the summer as ambient humidity is higher. I am using the reeflot, I would recommend it.

 

[nphsmith]

Great, sounds like the 10 litre will get me through the week. Many thanks.



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[Ichthyologist]

and for £5 these make great reservoirs RATIONELL Waste sorting bin - IKEA

 

[Tom Procko]

anyone able to work my tank evap rate??

 

[Tom Procko]

sorry forgot to mention lol 120cm long, 50 depth 🙂