Growrx said:

Iv personally used botanicare hydroguard myself but iv also heard great things about southern AG Fungicide, which is why I bought it for my next run in RDWC

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tobh said:

+1

Just make sure if you get hydroguard, it's not expired. Amazon is known to ship expired bottles, and I'm 90% sure the expired bottle I was using caused issues I was having keeping pH stable.

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Kylesidious said:

Awesome, thanks! I’ll pick up some hydro guard today then.

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tobh said:

If you can get southern AG instead, it's cheaper and a higher concentration so you technically get more for less on several fronts. @Aqua Man highly recommends that route instead of hydroguard just because of the concentration difference. Much cheaper by volume.

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