12 Inch Pipe Cleaning Brush Set with Stainless Steel Bristles, 8 Piece Variety Pack

8 Inch Nylon Tube Brush Set - Variety Pack (12 pieces)

Litmus pH Test Strips, Universal Application (pH 1-14), 100 Strips

Litmus pH Test Strips, Universal Application (pH 4.5-8), 100 Strips

pH Meter and TDS, EC, Temperature Meter (Accuracy: pH: ±0.1, TDS: ±2-5%, EC: ±2-5%, Temp.: ±0.1°C)