Check the listing for details. Aquarium Test Tube Holder Rack API Saltwater & Freshwater Master Test Kit Marine. Condition: New. Listed at 9.95 USD. Test Tube Holder Rack for the API Freshwater Test Kit. This is just for the rack/base - TEST KIT NOT INCLUDED.The API Freshwater Master Test Kit is the gold standard for checking the water chemistry of your aquarium. But it comes in a really poor quality container that is impossible to use regularly. Using this design and a syringe, I am able to keep test time to under 2 minutes. This version is the "Master + Hardness" Kit: Holds 12 test bottles and 6 test tubes Click Here to check out our other API Accessories This version is the "Master + Hardness" Kit: Holds 12 test bottles and 6 test tubes Made from a durable plastic that is water & chemical resistant Each kit is clearly marked from left to right: PH, NH4+NO2, No3, GH, KH Aquarium Test Kit Test Tube and Bottle holder bywaleedk Thingiverse thing:2440207 Created with Eselt - eBay Listing Templates Payment Shipping All orders ship the same or next business day Monday-Friday Returns Free 30 Day Hassle-Free returns, we want you to be 100% satisfied! Created with Eselt - eBay Listing Templates Links Our Store Seller Profile Feedback About us Contact More items Are you looking for something similar? See our other items! Show more items Contact Give us a call Send us a message