TNB Naturals pH DOWN

Our take on the TNB Naturals pH DOWN

TNB Naturals pH Down is a 1 lb granular pH reducer for hydroponic and aquaponic systems. It is marketed as non-caustic and safe for beneficial bacteria, which matters in aquaponics where harsh acid can crash the biofilter. At $14.58 at TNB Naturals as of November 6, 2026, it is the lowest of the three new prices we track.

TNB Naturals pH DOWN prices at every store

TNB Naturals pH DOWN price history

Lowest price we've seen: $13.95 on Nov 7 at Discounted Hydroponics. Tracked across 11 stores since Nov 7.

Questions and answers

Is TNB Naturals pH Down safe for aquaponics?

It is marketed as non-caustic and safe for beneficial bacteria, which is the key concern in aquaponics. Add it gradually and check pH after mixing so the biofilter is not shocked.

How much do I use per gallon?

No dosage rate is published with the product. Start with a small pinch per gallon, mix well, and re-test before adding more.

Granular or liquid pH down, which is better?

Liquid acids act faster and are easier to dose precisely. Granular is easier to store and less caustic to handle, but it needs time to dissolve.

Will it hurt my plants or fish?

The label says it contains no harmful chemicals and won't harm beneficial bacteria. Overdosing still swings pH sharply, so dose in small steps.

Is $14.58 a good price?

It is the lowest of the three new prices we track, at TNB Naturals as of November 6, 2026. Compare against the other two stores before buying in bulk.

What is in the bucket?

One 1 lb bucket of granular pH reducer. No measuring scoop or dosing guide is listed.

Where is the TNB Naturals pH DOWN cheapest?

At TNB Naturals, for $14.58, as of our latest check.

Where can I buy the TNB Naturals pH DOWN?

8 stores we checked sell it, including TNB Naturals, Green Dragon Grow Supply, eBay, Discounted Hydroponics, Extended Seasons Indoor Gardening.