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post #1 of 28 (permalink) Old 05-13-2005, 11:44 PM Thread Starter
 
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Ro/di Water

I like to do the diy stuff so what do i need to make ro water ( as in kh and gh)?
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post #2 of 28 (permalink) Old 05-14-2005, 12:16 AM
 
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Quote:
Originally Posted by bigfoot
I like to do the diy stuff so what do i need to make ro water ( as in kh and gh)?
I'm not quite sure I understand the question. If you have a good RO unit, there is no KH or GH - it's just H2O. You can't DIY RO.

Do you mean using RO and raising KH and GH???
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post #3 of 28 (permalink) Old 05-14-2005, 01:43 AM Thread Starter
 
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Well yes i need to how to buffer the gh and kh in the ro to make it right for my tank. In other words what chemicals do i add to it to raise gh and kh. Thanks
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post #4 of 28 (permalink) Old 05-14-2005, 01:58 AM
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Use tap water. It's free and it works like a champ.

The real question I have though is why do you feel the need to use RO water in the first place?
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post #5 of 28 (permalink) Old 05-14-2005, 02:08 AM Thread Starter
 
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Because i am working a biotope.
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post #6 of 28 (permalink) Old 05-14-2005, 02:19 AM
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The true biotope water might have near zero kh and gh, which is hard to mimic in the tank, without causing problems. Anyway, the easiest/free way to add back kh and gh is, mix partial RO and tap water. You can use a different RO/tap ratio to achieve different kh/gh. Of course you loose the flexibility of adjusting kh/gh indepenently, but works fine in most cases. Or, if you want buy commercial products, get RO right or Seachem Equilibrium. Or use generic chemicals, baking soda for kh, CaCl2, MgSO4 etc for GH.

Still, I am Rex. What does this gain you in a biotope? So the soft water fish feel more at home?


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post #7 of 28 (permalink) Old 05-14-2005, 03:53 AM Thread Starter
 
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I want to get as close to nature as possible. Basicly something do that is fun.lol
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post #8 of 28 (permalink) Old 05-14-2005, 03:59 AM
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you will find it more challenging than "fun" if you use RO water. I gave it up on my planted tank a while back (still use it on my Ray and Arowana tank though, but 50/50 tap/RO), as I was realizing that tap water had more nutritional values than you could even gain from adding chem's to pure RO water.

Do you happen to know what your KH and GH levels are in your tap water?

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post #9 of 28 (permalink) Old 05-14-2005, 05:18 AM Thread Starter
 
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But i live in a place where my water comes thru copper pipes i have not tested. But this could be a problem.

Last edited by bigfoot; 05-14-2005 at 03:52 PM.
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post #10 of 28 (permalink) Old 05-14-2005, 01:16 PM
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My house has copper pipes and we have very acidic water from the tap here. If there is a faucet that has a leak it will stain the sink green in just a couple of days. The secret is to flush the pipes before using the water. Also you can take a sample to a reef store and have it tested for copper. I will assume that you drink the water from the tap. Do you worry about copper or lead toxicity?
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post #11 of 28 (permalink) Old 05-14-2005, 04:01 PM Thread Starter
 
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Your telling me that copper and other heavy mentals wont hurt or kill plants and fish.Is this correct.
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post #12 of 28 (permalink) Old 05-14-2005, 05:27 PM
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There are some commericial products you can use to raise the GH of RO water, such as Seachem Equilibrium and Kent RO Right. You can also use Greg Watson bulk chemicals. For GH, add .0794 grams CaCl2 and .0333 grams MgSO4 per gallon to increase GH by 1 dGH (this is a 4:1 calcium:magnesium ratio). For a Biotope I would say probably 2 or 3 dGH is what you would want.

For potassium, you can dose Greg Watson K2SO4. Add .00844 grams per gallon to increase potassium by 1 ppm. I'd say probably 10 ppm is good.

For KH, you can use baking soda, which is sodium bicarbonate, or Seachem Alkaline Buffer, which is a blend of different bicarbonate salts (but predominately, I believe, sodium bicarbonate). Add .119 grams per gallon to raise alkalinity by 1 dKH. I'm unsure of the exact dosage for baking soda, but I would guess it's probably fairly close to Seachem Alkaline buffer. For a biotope, I would go for around 4 or 5 dKH.
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post #13 of 28 (permalink) Old 05-14-2005, 05:39 PM
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to add on to the KH dosing, in case he doesnt have a gram measuring scale... 1 teaspoon baking soda raises KH by 1dH in a 50g tank. If you are injecting co2 then you just need KH anywhere between 4 and 8, depending on what you want your pH to be. Not sure what the exact KH should be in a "biotype" though.

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post #14 of 28 (permalink) Old 05-15-2005, 01:35 AM
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Quote:
Originally Posted by bigfoot
Your telling me that copper and other heavy mentals wont hurt or kill plants and fish.Is this correct.
I'm not saying that. But do you drink and/or cook with the water? You can have the water tested for copper at a reef store free or very cheap. Your county health department should offer lead testing.
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post #15 of 28 (permalink) Old 05-15-2005, 04:51 AM Thread Starter
 
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Quote:
Originally Posted by Hypancistrus
There are some commericial products you can use to raise the GH of RO water, such as Seachem Equilibrium and Kent RO Right. You can also use Greg Watson bulk chemicals. For GH, add .0794 grams CaCl2 and .0333 grams MgSO4 per gallon to increase GH by 1 dGH (this is a 4:1 calcium:magnesium ratio). For a Biotope I would say probably 2 or 3 dGH is what you would want.

For potassium, you can dose Greg Watson K2SO4. Add .00844 grams per gallon to increase potassium by 1 ppm. I'd say probably 10 ppm is good.

For KH, you can use baking soda, which is sodium bicarbonate, or Seachem Alkaline Buffer, which is a blend of different bicarbonate salts (but predominately, I believe, sodium bicarbonate). Add .119 grams per gallon to raise alkalinity by 1 dKH. I'm unsure of the exact dosage for baking soda, but I would guess it's probably fairly close to Seachem Alkaline buffer. For a biotope, I would go for around 4 or 5 dKH.

In the CaCl2 the Cl2 part is chloride is this correct if so i have read that this can be a bad thing. Can you explain this one better or give a article that i can read up on it. THANKS
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