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Old 05-16-2013, 09:44 PM   #16
WheeledGoat
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actually, now that I look at it closer, that chart I posted above is backwards. it says "too much co2" and highlights the cells RED where there is actually too little co2!

try this one instead. (or just google for a ph kh co2 chart and pick one you like)
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Old 05-17-2013, 01:10 PM   #17
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You can hardly expect red plants if you have low light, they will turn green for sure, I believe.

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Old 05-17-2013, 02:46 PM   #18
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Quote:
Originally Posted by plantbrain View Post
I'd say 40-50 ppm is a better target personally.

10-20 ppm is too low for most tanks IME.

Note, those ppm's are based off lighting intensities from like what? 20 years ago when folks had T12's........

Much less light= much less CO2 is needed to reach a decent level.
Ca around 3-5ppm in this tank:

however maybe some plant sp. care about more Ca


EDIT; sorry Tom i misunderstood the post, i must be going blind or something
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Old 05-17-2013, 03:24 PM   #19
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Quote:
Originally Posted by happi View Post
Ca around 3-5ppm in this tank:
50g planted tank - YouTube

however maybe some plant sp. care about more Ca
Tom is saying 10-20 ppm co2 is too low. not CA
he previously stated 3 ppm is a lot for growth of plants
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Old 05-17-2013, 05:15 PM   #20
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Quote:
Originally Posted by HD Blazingwolf View Post
Tom is saying 10-20 ppm co2 is too low. not CA
he previously stated 3 ppm is a lot for growth of plants

oops one of those days again, sorry for misunderstanding, yeh 3ppm of Ca was enough to support the plant growth, long as Co2 and other nutrients are up.
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Old 05-17-2013, 05:18 PM   #21
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Quote:
Originally Posted by plantbrain View Post
I've yet to see Ca even become an issue with anyone's tap, ever.

Not saying it could not happen.......3 ppm is a lot as far as plant growth is concerned.
+1, i had plant growing under 3ppm Ca, as long as your provide good co2 and NPK/traces then you are good.
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Old 05-17-2013, 06:06 PM   #22
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Quote:
Originally Posted by happi View Post
oops one of those days again, sorry for misunderstanding, yeh 3ppm of Ca was enough to support the plant growth, long as Co2 and other nutrients are up.
i have those days all the time
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