水草情迷

Because my tank have no cover on the top, the water evaporate very fast and i need to refill water every 3 or 4 day...
(becoz my tank is small, if i don't re-fill, there is not much space for fish to swim and some grass will above the water.)

Any methode of solving it?? Can it be solved by covering the tank with 保鮮紙??? but will it affect the lighting and seems that it will be very urgly....

It will affect gas exchange on water surface if you seal off the top. Don't worry about it, spring is coming, and when hunidity is high, problem solved... And when summer comes, you would love the evaporation since it helps cool down your tank.

yes, i started my tank in last Septamber and don't have this problem untill i introduce the electric warmer into my tank in December. And i feel very ma fan of refilling water, becoz when i what to change water, the water level is too low that i need to refill it and change it in the day after.

By the way, is gaseous exchange on water surface important??
I have air pump and DIY CO2 ga wor.

(sorry for not typing chinese.... )

Yes, gas exchange is very important. Even air pump is used to drive water current on surface to speed up gas exchange.

But why would you use an air pump? Turning off CO2 injection should be more than enough at night for a planted tank.

"But why would you use an air pump? Turning off CO2 injection should be more than enough at night for a planted tank."

I never think of this question wor. The air pump is used since I fill the tank with water, when it have mud, and very few plants only. Also, DIY CO2 seems difficult to turn off.

see see my tank now.....very small, not enough 10L.