Your Crystal Water Monitor comes with a trial-size tube of Insta-Test 6 Plus Test Strips which can be photo scanned for regular water reports of TA, TH, and CYA. These test strips are the recommended test strip of Crystal Water Monitor. If you run out of your Insta-Test 6 Plus test strips you can purchase more on Amazon:
 | Insta-Test 6 Plus Test Strips
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You're also welcome to use any other test strips you may already have by comparing the colored pads to your test strip packaging and entering the numbers directly into the Crystal app.
The Crystal Water Monitor App also allows photo scanning for other brands of test strips. Here is a list of other test strips that support in-app photo scanning:
| @Ease 4-Way Smartchlor Test Strips |
| Ace 4 Tests In One Test Strips |
| Ace 7 Tests In One Test Strips |
| Aqua Health 4-Way Test Strips |
| Aqua Smarte Plus 4-Way Test Strips |
| Aquarius 5 In 1 Test Strips |
| Baracuda 6 In 1 Test Strips |
| Brillance Strips 5-Way Test Strips |
| F1Rst Choice 4 In 1 Test Strips |
| F1Rst Choice 5 In 1 Test Strips |
| F1Rst Choice 7 In 1 Test Strips |
| Frog 4-Way Test Strips |
| Hth 6-Way Test Strips |
| Hth Early Warning 4-Way Test Strips |
| Hth Spa 4-Way Test Strips |
| Insta-Link |
| Insta-Test 3 Plus Test Strips |
| Insta-Test 4 Plus Test Strips |
| Insta-Test 5 Plus Test Strips |
| Insta-Test 6 Plus Test Strips (recommended) |
| Insta-Test Pool 4 Plus Test Strips |
| Insta-Test Pro 400 Plus Test Strips |
| Insta-Test Pro 600 Plus Test Strips |
| Jacuzzi 5-Way Test Strips |
| Jed Pool Tools 5-Way Test Strips |
| Jed Pool Tools 7 Tests-In-One Test Strips |
| Leisure Time Bromine 4-Way Test Strips |
| Leisure Time Chlorine 4-Way Test Strips |
| Ocean Blue 3-Way Test Strips |
| Pentair Rainbow 3-Way Test Strips |
| Pentair Rainbow 5-Way Test Strips |
| Poolife 6-Way Test Strips |
| Poolmaster Smart Test 4-Way Test Strips |
| Poolmaster Smart Test 6-Way Combo Test Strips |
| Quik Stix 4 Test Strips |
| Quik Stix 6 Test Strips |
| Spa Selections 4 Way Test Strips |
| Sundance 5-Way Test Strips |
| Swimline Hydrotools 4-Way Test Strips |
| Swimline Hydrotools 6-Way Test Strips |
| Water Trends Quick 5 Test Strips |
| Water Trends Quick 7 Test Strips |
| Zodiac 3-Way Test Strips |