03-02-2010, 04:03 PM
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Originally Posted by Angel079
Did I understand you right Byron? That Vallis grows worst in soft water then hard water? Because my exp is the complete opposite, while they grew nicely before for me with the harder set ups, now here in the new soft water home that are REALLY exploding.
How far do you think over what time frame would it lower the parameters? I'd have to find my notes but this tank was set up early Nov last year and after the initial cycle this tank has been pH 7.6 and KH5 since then (with a tap water of KH1 and pH 6.8 )
I know of others locally (Vancouver) who say they have success with Vallisneria in our soft water, but years ago I found it grew much better in my livebearer tank than in my Amazon tank. In the alkaline tank it was deep green, lush, runners all over; not in the other. Just my experience.
I've no data on the effect on pH, it is only a surmise. As I mentioned, I suspect it would be insignificant. If Lee can find the article I would be interested in reading it. Diana Walstad has several references in her book to articles on photosynthetic carbon assimilation, but all I found online were abstracts and I've not had time to try and locate the periodicals and thesis through libraries.