Fertilizers and General Hardness

[Machete]

Hi everyone,

The water in my planted tank is testing in the range of 150 ppm GH (I'm using Aquarium Coop test strips). I don't have any rocks or substrate in that tank that would raise general hardness so much, so I am wondering if it's the fertilizers. I'm using ADA Green Brighty N, Neutral K, Iron, and Mineral. Coyld any of these affect GH? (Note: I was using Green Brighty K until a couple of weeks ago when I changed to Neutral K, but the GH high levels persist).

Thanks!

[CalmedByFish]

Have you tested the GH of the water from the tap? I'm wondering if it's high.

[Mmiller2001]

If any of those contain magnesium or calcium or both, then the answer is yes.

[Machete]

On 8/17/2021 at 2:55 PM, CalmedByFish said:

Have you tested the GH of the water from the tap? I'm wondering if it's high.

Yes, my tap water is super soft

[Machete]

On 8/17/2021 at 2:58 PM, Mmiller2001 said:

If any of those contain magnesium or calcium or both, then the answer is yes.

Yeah, the Minerals one has Magnesium, that's what I was suspecting, thanks!

[Mmiller2001]

BTW, excellent job on your tank. It looks really good!