The Harvest Company pH Control Kit 1.4 oz. Organic Nutrient Solution Crystal Concentrate Application Type Tester and Adjuster (VPTK4) theharvestco BPA-free and food-safe plastic construction

BPA-free and food-safe plastic construction

Use the dimmer switch to keep light intensity lower during early rooting stages

Recommended pH range for most crops is 5

Made from organic and biodegradable materials

They work well for growing vegetables

The Harvest Company pH Control Kit 1.4 oz. Organic Nutrient Solution Crystal Concentrate Application Type Tester and Adjuster (VPTK4) theharvestco BPA-free and food-safe plastic constructionThe Harvest Company Complete pH Testing and Adjusting Kit Easy to Use pH Testing and Adjustment Solution for Healthy Plant Growth The Harvest Company Complete pH Testing and Adjusting Kit provides everything needed to monitor and adjust the pH of nutrient solutions, reservoirs, and fertilizer mixes. This convenient kit includes a pH test kit along with crystal pH Up and crystal pH Down for accurate pH management across a variety of growing systems.