- Sku: HI735-25
- Vendor: Hanna
Hanna Instruments HI735-25 / 735-25 | Total Hardness Low Range Reagents (25 Tests) | Aquarium Testing
Reagent kit for the Hanna HI735 Total Hardness Low Range Checker HC, 25 tests per box. Four components: two 115 mL bottles of Reagent A, a 6 mL bottle of Reagent B, 25 powder sachets, and a 16 mL indicator bottle.
Needs the HI735 Checker to use. Browse all water testing or the rest of the Hanna Instruments range.
What Is in the Box
This is a four part kit, not a strip of sachets. Each test uses a measured amount of several components, which is why the box is heavier than most Hanna reagent refills.
| HI735A-0, Reagent A | 2 bottles, 115 mL each |
| HI735B-0, Reagent B | 1 bottle, 6 mL |
| HI735C-0 powder | 25 sachets |
| HI735IND-0, indicator | 1 bottle, 16 mL |
Together that is enough for 25 total hardness tests. Every component is printed with a lot number and an expiration date.
Fits Only the HI735
These reagents are specific to the HI735 Total Hardness Low Range Checker. They are not interchangeable with reagents for Hanna's alkalinity, calcium, phosphate or nitrite checkers, each of which has its own reagent code.
Like the meter itself, this is a low range freshwater and source water test. It will not read saltwater or reef tank water, which sits far above the 350 ppm top of the range.
Storage and Shelf Life
- Hanna marks these reagents freeze sensitive, so keep them above freezing
- Store in a cool dry place out of direct sunlight, caps closed
- Check the printed expiration date before testing. Reagent past date can read low or develop color slowly
- Hanna classes these reagents as hazardous to ship, so they travel ground only
Specifications
| Brand | Hanna Instruments |
| Reagent code | HI735-25 |
| Tests per box | 25 |
| Contents | 2 x 115 mL Reagent A, 6 mL Reagent B, 25 powder sachets, 16 mL indicator |
| Fits | HI735 Total Hardness Low Range Checker HC |
| Measures | Total hardness (GH) as CaCO3, 0 to 350 ppm |
| Handling | Freeze sensitive, ground shipping only |
Frequently Asked Questions
Is this freshwater or saltwater?
Freshwater, plus the tap, well or RO water going into any tank. Saltwater reads above the meter's range.
How many tests do I get?
25. The box holds enough of each of the four components to run 25 tests.
Is it just powder packets?
No. There are 25 powder sachets plus three liquid bottles. All four are needed, so keep the box together.
Will these work in another Hanna checker?
No. Each Hanna checker takes its own reagent code. These are HI735 only.
What if it is past the printed date?
Hanna prints the date so you can judge for yourself. Out of date reagent is not dangerous, it loses potency, so results can drift low.
Have a question?
Hanna Instruments HI735-25 / 735-25 | Total Hardness Low Range Reagents (25 Tests) | Aquarium Testing
