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GH and KH Parameters

Mon Nov 30, 2020 5:27 pm

I've never really payed attention to water chemistry apart from PH, ammonia, nitrite and nitrate levels.
Recently purchased API's GH and KH test kit to check water hardness. The only thing I add to the water is cichlid lake salt

Tap water
PH 7.4
KH - 4
GH - 7

Tank water
PH 7.4
KH - 4
GH - 11

1. Are these levels OK?
2. Should I add anything else?
3. Should I stop with the salt?

Re: GH and KH Parameters

Mon Nov 30, 2020 7:33 pm

shiftyfox wrote:Tank water
PH 7.4
KH - 4
GH - 11


Is this just after or just before your weekly water change? Levels are fine if consistent.

Re: GH and KH Parameters

Mon Nov 30, 2020 7:41 pm

Water change was 3 days ago. Just wondered if KH should be higher but guess this would then mess with the Ph..

Re: GH and KH Parameters

Tue Dec 01, 2020 8:54 am

There are various dynamics that affect pH but it looks like yours is stable, which is the bottom line. I wouldn't mess with anything.

Re: GH and KH Parameters

Mon Dec 14, 2020 11:35 pm

It is OK for me.

Re: GH and KH Parameters

Wed Dec 16, 2020 8:26 am

shiftyfox wrote:3. Should I stop with the salt?


If you stop with the Cichlid Lake Salt then looks like your GH would go back to 7, which is also fine for most africans. But I'd make the change gradually over a few weeks' water changes.

Re: GH and KH Parameters

Wed Dec 16, 2020 11:05 am

I would not stop with the salt. 7 might work but 7.4 would work better.

Re: GH and KH Parameters

Wed Dec 16, 2020 1:21 pm

DJRansome wrote:I would not stop with the salt. 7 might work but 7.4 would work better.


Cichlid Lake Salt doesn't affect the water's pH.

Re: GH and KH Parameters

Wed Dec 16, 2020 11:05 pm

ken31cay wrote:
DJRansome wrote:I would not stop with the salt. 7 might work but 7.4 would work better.


Cichlid Lake Salt doesn't affect the water's pH.


That really depends on the recipe in question, as many/most do.

Re: GH and KH Parameters

Thu Dec 17, 2020 6:17 am

Fogelhund wrote:
ken31cay wrote:
DJRansome wrote:I would not stop with the salt. 7 might work but 7.4 would work better.


Cichlid Lake Salt doesn't affect the water's pH.


That really depends on the recipe in question, as many/most do.


If OP is using Seachem Cichlid Lake Salt (my assumption), then it won't affect pH.

Re: GH and KH Parameters

Thu Dec 17, 2020 9:38 am

Maybe they should just use the buffer recipe on this website then.

Re: GH and KH Parameters

Thu Dec 17, 2020 11:20 am

Fogelhund wrote:Maybe they should just use the buffer recipe on this website then.
Plus one. Also agree that lots of things are labeled cichlid salt and could have sodium bicarbonate as well as other ingredients.

Re: GH and KH Parameters

Thu Dec 17, 2020 11:23 am

I use a teaspoon of Seachem lake salt and a teaspoon of Epsom salt on each weekly water change.

Re: GH and KH Parameters

Thu Dec 17, 2020 12:47 pm

shiftyfox wrote:I use a teaspoon of Seachem lake salt and a teaspoon of Epsom salt on each weekly water change.


You can discontinue as both of these only affect the GH but not the pH.

Re: GH and KH Parameters

Thu Dec 17, 2020 2:54 pm

I’m not trying to increase the Ph, I’m quite happy with a stable 7.4

I just thought adding the salt would introduce some minerals to the tank water
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