What is the cheapest, most reliable pH tester other than litmus paper. I want something I can use until I can afford a $200+ tester (in about 2 months).

I use Kroger brand Distilled water, and I'm pretty sure the pH is around 5-5.5 from how my plants are acting.
Jouryokujin Reviewed by Jouryokujin on . pH meter - prices What is the cheapest, most reliable pH tester other than litmus paper. I want something I can use until I can afford a $200+ tester (in about 2 months). I use Kroger brand Distilled water, and I'm pretty sure the pH is around 5-5.5 from how my plants are acting. Rating: 5