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Seiru Stone and hardness increases

Joined
16 Aug 2010
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631
Just read in the journal section it will raise hardness. I never thought they'd have that much of an effect!

How much will they typically raise hardness levels? I'm using rainwater so it's fairly soft to begin with. I was looking at keeping RCS and was hoping they'd be ok. It's around 2kg of stone in 30L.
 
The tapwater in my area is really soft and I've just set up a 60l scape with about 5kg of Seiryu stone. I've been checking the parameters each day for 10 days and the hardness has barely gone up at all. Maybe Aqua Soil cancels out the effect?
 
Thanks you two. I'm guessing it should be ok then!

Aqua Soil supposedly softens the water so maybe?
 
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