How to treat calcium deficiency? - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 05-22-2011, 07:08 PM Thread Starter
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How to treat calcium deficiency?

Hi TPT,

So it looks like my plants are going through some calcium deficiency. I have some crypt wendtii that have cupped leaves (outside edges curled downwards and in) and very few leaves are all weirdly twisted. My argentine swords also have some leaves that are yellowing on the edges, with the very outermost portion of that becoming clear and melting away. Does this sound like calcium deficiency?

I have been dosing KNO3, K2SO4, KH2PO4, and CSM+B, as well as Flourish Comprehensive, but the only one of these that has any calcium is the Flourish, and it's probably not enough.

I just ordered a pound of CaSO4 from GLA and it will probably take 3 days to get here. I also have some Seachem Equilibrium coming in soon, but I'm reluctant to add more Mg, as that's a component of CSM+B already. Will it be fine until then or should I do something sooner? The swords are still putting out new leaves, and some of the other plants are putting out growth as well, but I'm not sure how calcium deficiency affects these things.

Also, how much CaSO4 should I be adding? It's a 55G tank, and I don't have a calcium test kit, but my GH is 6 after adding CSM+B.

Lastly, I have DIY CO2, and somehow have achieved a 1.0 pH drop only running two 2L bottles on a 55G. Should I cut this off (as well as other dosing) until I get some calcium in there, as the plants may be limited right now?

Thanks!
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post #2 of 7 (permalink) Old 05-22-2011, 08:31 PM
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Co2, CO2 and CO2.........

there's no fear of Mg..........so adding seachem Eq is fine........




Regards,
Tom Barr
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post #3 of 7 (permalink) Old 05-22-2011, 09:07 PM Thread Starter
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Quote:
Originally Posted by plantbrain View Post
Co2, CO2 and CO2.........

there's no fear of Mg..........so adding seachem Eq is fine........
so it's likely not a Ca deficiency when I see curling of the leaves? I honestly feel like I have no clue what I'm doing
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post #4 of 7 (permalink) Old 05-22-2011, 09:44 PM
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I would say for 90% of americans, CA deficiency is very unlikely. Our source water doesn't allow it.

DIY co2 is going to be very hard to run a consistent and stable level on a tank that size. Lowering light is usually a good solution to match low co2.
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post #5 of 7 (permalink) Old 05-22-2011, 11:00 PM Thread Starter
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Here's a picture of my sword's leaf:

http://imageshack.us/photo/my-images/694/sam0211x.jpg/
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post #6 of 7 (permalink) Old 05-22-2011, 11:12 PM
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We get sierra snow melt from a granite basin, the tap water here and in SF, as well as up the coast from here is extremely soft in terms of KH and GH.

I've never seen any confirmed Ca++ defiencent plants in some 20 years of keeping them and using CO2.

CO2?

Almost daily.........
And DIY CO2...??.........well........I really do not need to say more.




Regards,
Tom Barr
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post #7 of 7 (permalink) Old 05-22-2011, 11:36 PM
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deficiency or not you don't need to order CaSO4 just go buy some plaster of paris from home depot, $10 will net you a lifetime supply. Same with MgSO4, epsom salts.
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