Anyone use these? I just want to make occasional checks of the rainwater I’m using at the moment. I don’t use CO2 so not sure how much it’s going to change anyway. They sell PH4 to PH9 papers for a couple of quid on the auction site.
They work, but they are a bit rough and ready, and as you get towards pure water they become less and less useful. You can <"specific range pH papers">, but they are quite expensive.They are a bit rough-and-ready and rely on your judgement in comparing the colour against the chart.
They won't help with this. If you don't have any carbonate buffering at all <"they will read about pH6">, but as soon as get even a trace of dKH <"they will read pH8.">I just want to make occasional checks of the rainwater I’m using at the moment.
I’m dubious about this, that looks like a generalizationFor most things it seems to need to be between around PH7 and PH8.
It won't be too acidic, but even if it read pH4 it would any need a very small amount of bases (H+ ion acceptors) for the pH to rise. You will have hard tap water, and even 10% tap will raise the pH well above pH7.I have no way of knowing what the stuff in my water butt is but I could add tap water if it’s too acidic.
They are straightforward to use, but because you don't have many ions present (in rain water) you won't get much colour change. pH is a ratio, so it always needs some interpretation.This type of PH papers look pretty straightforward to read to me? Each paper has two patches that change colour.
For most things it seems to need to be between around PH7 and PH8.
I agree with @alto, it really depends on the fish.Most South American fish and many Asian fish come from acidic waters, sometimes as low as pH 3
One water butt collects from a clay tiled roof the other from a plastic (shed) roof. All gutters are plastic and so are the butts.Aqua
The only concern could be on how its collected and stored eg metal or old cement tiled roof and in an old rain water tank.
Perfect.One water butt collects from a clay tiled roof the other from a plastic (shed) roof. All gutters are plastic and so are the butts.
Can you physically fit another butt in? You can get kits to <"daisy chain them together">.I have enough water (400L) at the moment for water changes for my 10L Nano but I’m not sure how long it will last when I set up my 35L.
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