High pH low kh

[Trilobite]

My tank water is ph= 8.4  gh=7  kh=5

Out of the tap the water is 7-7,2. How do I stop the pH swings? would adding coral help or would that just further bump up the pH?

The tank is also planted, would that have something to do with it too?

 

Thanks

 

[bunty]

I have the same but the high ph suits me . I would like to know why in case it stays low .

I did a 70% water change 180lt tank and within two weeks above 8ph .

Tank has been set up for at least 5 years . Have about 50mm of gravel full of mulch with some plants .

Cheers Chris  

 

[alexyay]

So is your pH increasing in your tank? This is a bit unusual - do you have anything eg concrete, coral, aragonite, limestone etc in the tank? 5dKH isn't super soft, so you'd probably (off the top of my head) expect around 7.0 as a pH (obviously depends on lots of things)

 

I've personally found pH swings don't impact fish noticeably - rather the KH and GH swings are what I've found affect fish. My pH drops from 8.6/8.0 (tap water, 50% WCs so tank will even out between the two) to 6.6/6.0 over the week (KH 2-3) and obviously increases with WCs again but it doesn't appear to cause any obvious stress (raised Apistogramma, Killifish, Kuhli and Corydora fry).