Ideal kh for my 90 gallon planted tank - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 04-28-2011, 01:04 AM Thread Starter
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Ideal kh for my 90 gallon planted tank

I have 10 barbs, 6 snails and two little pleco. I have an assortment of plants. Including Christmas moss and a sword plant. I have very low kh in my water so I have been using baking soda to raise it between 3 and 4. I have a pressurized co2 system. Is 3-4kh my ideal range? What would anyone recommend?
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post #2 of 7 (permalink) Old 04-28-2011, 01:34 PM
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I'm far from an expert, but my setup sounds similar to yours. I mix RO and tap water to get a kh of about 4 and everything seems to be going swimmingly.

Is your gh really low too?
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post #3 of 7 (permalink) Old 04-29-2011, 03:47 AM
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I think that's fine. You may also want to build the GH with a product like Seachem Equilibrium. In addition to Calcium and Magnesium and trace amounts of iron it provides good amounts of Potassium which is an important macro- nutrient.
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post #4 of 7 (permalink) Old 04-29-2011, 08:54 AM Thread Starter
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Thank you. My GH has always been the same as my KH. I just assumed that it would stay the same. If your tank is good with a kh of 4 then I am happy with that. Thanks for the help guys.
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post #5 of 7 (permalink) Old 04-29-2011, 09:40 AM
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Yeah a KH of 3-4 is good. It helps buffer the water from pH swings which can happen when you turn on the CO2. GH doesn't matter too much (well...inverts need it along with KH to help build their shells). My GH is twice the value of my KH.

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post #6 of 7 (permalink) Old 04-29-2011, 02:24 PM
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Quote:
Originally Posted by Cardinal Tetra View Post
Yeah a KH of 3-4 is good. It helps buffer the water from pH swings which can happen when you turn on the CO2. GH doesn't matter too much (well...inverts need it along with KH to help build their shells). My GH is twice the value of my KH.
Ironically mine is the opposite (sorta). My GH is like 3-4 and KH is like 6. I live in NC so the water here is very soft and slightly acidic. The only reason my GH and KH are what they are is because I have ryouh rocks + its an established tank. Usually outta tap is like 0-1 GH and KH.

Also I am HIGHLY against adding a bunch of chemicals to any tank to mess with the water. You will go nuts trying to go against the water. Instead try to work with it, it will make your life so much easier. If you must add anything I recomend Baking soda and epsom salt.


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Disclaimer: Take my advice with a grain of salt. I only give advice based on first hand knowledge or from the knowledge of others. If im wrong please let me know.
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post #7 of 7 (permalink) Old 04-29-2011, 06:26 PM
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Most plants seem to prefer the lower KH in my experience so you are good. Keep in mind though that it doesn't hurt to add a bit to the GH just as insurance against any type of deficiency that may rise due to lack of calcium and magnesium. The swords seem to like more calcium- less leaf curl too.
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