4dkh solution???

[mudskippers]

Hey guys, can anyone help me find the link on how to make 4dkh solution.... I cant remember and its about time for a 'fresh batch'.... I know it has to do with a gallon of distilled water and baking soda... but thats all.....

Anyone got the link??

Thanks,
Jessica

[StereoKills]

http://www.plantedtank.net/forums/general-planted-tank-discussion/42429-kh-standard-how.html

[mudskippers]

Yep... Thats it...

Thanks so much.... :]

[jmhart]

I got lazy, didn't feel like going to all that effort so I tested my tap water, 2 d kH, added a bit of baking soda, then it was 8 d kH, diluted it in half...boom 4 dkH.

[leocom2000]

what do u need it for?

[jmhart]

It's used in a drop checker.

[The Zigman]

lets see... where did I put my graduated cylinders... Hmmm, I thought they were right here...

[WinnipegDragon]

Is there a simple way to make one using a volume measure instead of a weight measure? 1/8tsp instead of 6.2g or whatever it was?

[jmhart]

It's hard to give an exact number for "volume". You could use the density of sodium bicarbonate, but that wouldn't really work well because it's a fluffy powder, and so you'd still have to end up testing.

If your water is less than 4 d kh, you can just add a pinch of baking soda, re test, and dilute, retest, etc...until you have it. If your water is greater than 4 dkh, well, you have to buy some DI water anyway. Use that, add a little baking soda, test, see where it is. Dilute. See where I'm going?

[WinnipegDragon]

I have distilled water handy, so that's not an issue. I guess it was more of a question of a starting point for the bicarb.

[mr.key]

As long as we are mentioning distilled water what is the difference between using distilled water vs. RO

[WinnipegDragon]

Just the way that they purify. Distilled should be purer than RO, but if you use RO/DI it should be close to the same.