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[APD] RE: Aquatic-Plants Digest, Vol 15, Issue 29

S. Hieber writes: "Amazing but true. There is some evaporation but that is
solved with topping off. You can use ordinary water for this and the
molecules after a short itme align just like the rest, just like, well, like
Ice Nine."

True, but I'd point out that this is one of the few cases in
aquarium-keeping where the use of RO water is important. The aligned water
molecules, among their other amazing properties, don't allow impurities to
pass through them. So if you keep adding tap water to the top, you'll wind
up with an unpleasant-looking band from the accumulated impurities.

Also note that you want relatively low lighting in these setups (maybe even
less than 2 wpg). Otherwise the excess energy from the bulbs can cause the
water at the top of the tank to lose alignment.

And I won't even go into the deeply detrimental effect that substrate coils
have on such a setup...

- Jim

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