TheValiant1 TheValiant1
  • Not too shy to talk
  • Not too shy to talk
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  • Posted on: 1/6/2007 12:03
KH Levels #1
Hi, just done a test on my new aquarium which had been maturing well with live rock for a month now. The dKH level is 22 dKH which is way too high. I know what to do if it is too low but what do i do when it is too high? Thanks
EagleC EagleC
  • Plants Adviser
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  • Joined: 28/3/2007 11:01
  • From Hampshire
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  • Posted on: 1/6/2007 12:09
Re: KH Levels #2
1. Check the PH, if the KH is high the PH should be too. If it isn't then something doesn't match up.
2. What would you like the KH to be? Do a water change with pure RO to bring it down.

ooo wait, this is the marine forum! I missed that.

hmm. Don't know now as pure RO will affect your salinity too...
cmw328i cmw328i
  • Marine Adviser
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  • Joined: 10/4/2007 18:15
  • From Bedfordshire
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  • Posted on: 5/6/2007 8:28
Re: KH Levels #3
use pure RO/DI with freshly mixed salt... aka, do a water change with RO water
dragonet dragonet
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  • Posted on: 5/6/2007 21:43
Re: KH Levels #4
if your using a co3 machine this will bring your kh into check

if not dose lime water slowley it will raise your cal and drop your kh but whatch your ph and mag

your tank doesnt sound very balanced for a kh of 22
were you getting your water from ?


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TheValiant1 TheValiant1
  • Not too shy to talk
  • Not too shy to talk
  • Joined: 30/5/2007 13:28
  • From Cheshire
  • Group: Registered Users Basic Membership
  • Posts: 21
  • Posted on: 6/6/2007 15:18
Re: KH Levels #5
Thanks for the reply guys

I have beeb using my brothers RO Filter unit which has been emptying into a 200 litre water butt in the greenhouse. I did a quick test on the nitrate levels in the water and it was still 10mg. I guess he hasn't changed the filters for a while, which might explain these high KH levels.
cmw328i cmw328i
  • Marine Adviser
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  • Joined: 10/4/2007 18:15
  • From Bedfordshire
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  • Posts: 1244
  • Posted on: 6/6/2007 17:28
Re: KH Levels #6
oh yeah, have to keep up with the filters on those things... one of the reasons im happy to buy it at the LFS
leegaff leegaff
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  • From East Sussex
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  • Posted on: 6/6/2007 20:37
Re: KH Levels #7
when useing ro filters you should have a inline tds meter helps to tell you when your filter need chageing have a look here click here.
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