Aquatic Water Quality Test Tube Rack – Precision Meets Practicality Elevate your water testing routine with this sleek, lab-grade test tube rack designed specifically for aquatic enthusiasts, breeders, and hobbyists. Crafted from durable, chemical-resistant plastic, this holder keeps your test tubes upright, organized, and secure during water quality assessments. Features: - Holds up to four standard-size test tubes (optional) - Stable, non-slip base for spill-free testing - Lightweight and compact – ideal for desktop or tank-side use - Easy to rinse and sanitize between tests - Bright white finish enhances visibility of liquid color changes Whether you're monitoring pH, ammonia, nitrites, or other critical parameters, this rack ensures your testing process stays clean, efficient, and professional. A must-have for anyone serious about aquatic health and clarity. 4CT Rack Testing Tubes Optional