Need Water advice - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 01-30-2005, 12:59 AM Thread Starter
 
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Need Water advice

I am starting to set up a 75 gallon planted tank with co2 and almost 3wpg. The substrate is flourite with a few pieces of driftwood. I have not added any plants yet because I wanted to let everything level off and give myself time to learn the CO2 equipt.

My water from the tap is:

PH 9 originally 7.0 after sets for 48hrs
Kh 4

Water in Tank 6.4
KH <1

I have very soft water and the issue I have is that due to the extremely low KH, I can barely get any Co2 without tanking the PH. Any thoughts on what to add or what would be the optimum PH value/ KH value?


Thanks
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post #2 of 3 (permalink) Old 01-30-2005, 01:07 AM
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Hi Caribwill, welcome to the Planted tank!

Soft water is often discussed on this board, to start with have a look here: https://www.plantedtank.net/forums/showthread.php?t=8949

A search for soft water should give you more stuff to read.

Baking soda is commonly used to increase the kH and with it the buffering capacity of water that's too soft .


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post #3 of 3 (permalink) Old 01-30-2005, 01:20 AM
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1 teaspoon baking soda per 50 litres will raise your kh by 4 degrees.

You should really be looking for a kh of around 4 to be able to have a decent buffering capacity and therefore a stable ph.


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