try to make a fertilizer for Calcium - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 07-04-2019, 09:58 AM Thread Starter
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try to make a fertilizer for Calcium

I just used the 50 grams of CaSO4 0.5 H2O today to make a fertilizer for my aquarium. because I needed 10 ppm of Ca, I put the entire amount to 250 ml of RO water. total disaster. I ended up with 1L water by adding RO water and I still have a sample like milk. If I left the sample sit for a while the bottom become solid. What is the solubility of this? how much can I add?
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post #2 of 6 (permalink) Old 07-04-2019, 12:00 PM
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About 0.24g/100ml


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post #3 of 6 (permalink) Old 07-04-2019, 02:09 PM Thread Starter
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with this solubility there is no way to get 10 ppm of Ca. what is the solution to add 10 ppm of Calcium??
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post #4 of 6 (permalink) Old 07-04-2019, 02:36 PM
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I dose the compound directly in my corner filter.
Sometimes cloudy for an hour sometimes not.
If it lumps together it takes longer to dissolve withou a cloud though.


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post #5 of 6 (permalink) Old 07-04-2019, 03:01 PM Thread Starter
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because until now I make only liquid solutions, if you put directly your fertilizer as powder in your tank you have good dilution?? The calcium will dissolve completely??
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post #6 of 6 (permalink) Old 07-04-2019, 03:15 PM
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As long as you are not too close to the solubility limts of the total tank volume.


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