[plantbrain]

Cac co,

Gloss does well with enough NO3 (nitrates), and K+(potassium) and light/CO2.

Water hardness plays NO role in it's growth, I've grown it very well at high GH/KH values, above 20 degrees.

You have plenty of light(Gloss can be grown fine at 2w/gal FYI).
CO2 seems to check out.

So all that's left is nutrients.
At high light, you need to be more consistent on your dosing and there is less room for error.
Do not be lam bing!

The plant will melt. Make sure you add about 1/8 teaspoon of KNO3 every 2-3 days along with what you are now doing.

Regards,

Tom Barr

 

[plantbrain]

Give it another week.
Less light will help, like 30watts and high CO2.

Dose 1/8 teaspoon of KNO3 2x a week for now.
That's more than enough.
Do 50% weekly water changes.

Do not trust your NO3 test kit from RS, it's junk.

Each dose of KNO3 will add about 11ppm of NO3, the most Gloss will remove is about 3-4ppm a day of NO3.
So22ppm is more than enough even at high light.

Regards,
Tom Barr