Tank running on fan causes fast evaporation

**jervinphua** · 9th Aug 2013, 23:25

Hi Guys,

Since I am addting water every others day, does it be that I am not require to do weekly water change?

**Berny** · 9th Aug 2013, 23:35

no, you still need to do water change. topping up of water is just filling it up, or diluting whatever chemical thats in it, but topping up does not remove them and they will build up over time and crash the ecosystem

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**qngwn** · 10th Aug 2013, 01:57

Evaporation = H2O removal, nothing else

Topping off of water means over time, minerals and chemicals accumulate in your water, and in some cases, it might be toxic for your fauna.
Water changes helps to regulate the water parameters.

You can top off water throughout the week, but do remember to do your weekly/ fortnightly water change as per normal.