how much hardeness?

TheKillHaa

Prolific Poster
Oct 31, 2007
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Hi,
my tap water . 26° Gh, pH 7.8.

650 gal, over 50 sp of plants, strong light (california sun), barely filtered. almost none fish, just plants!

EI for 2 years, but for water changes (over 60% weekly) i been use mixes of Ro and Tap water in all ratios possible so far, but i have no clear yet if hardeness directly from my tap water is affecting some plants or should i standarize a max Gh value.

Ph is lowered with heavy dose of Co2.

any help/guidance will be very much apreciate.
 

Tom Barr

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Jan 23, 2005
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I've not found much issue with high GH, KH is another matter.

I had 24 GH for a couple of years without any issues.

Plants grew very well.

Regards,
Tom Barr
 

TheKillHaa

Prolific Poster
Oct 31, 2007
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Gracias Tom!!

yesterday i made a water change 100% of tap water, now i wil use RO just for top off evaporation.

T.