Replacement Test Tubes Glass (2pk) SKU: PHT38 Categories: Aquarium Accessories, Aquarium Water Testing Related products Foam Insert Aquaclear 300 / 70 Foam Insert Aquaclear Mini / 20 Aquafx 2ft Cabinet & Hood Black 24×12 Assembled (Pickup or local delivery only) Aquafx 3ft Cabinet & Hood Black 36×15 Assembled (Pickup or local delivery only)