Dolphin Impeller With Screw - Black safety-cover-type_Mesh - Heavy Duty has 6 inch connections with

has 6 inch connections with a filtration area of 34 square feet and features a 100% non-corrosive thermoset composite structure with a gel coat and marine grade finish

The total alkalinity is a measure of how much of the alkaline substances there are in the water

Dash 5 (-5) for deck to water level from 5 - 8 inches

The LaMotte 4335-H Free Chlorine/Bromine/Alkalinity/pH Combination 3-Test Spin Disk tests for these four elements and can test up to 3 times on the disk

Dolphin Impeller With Screw - Black safety-cover-type_Mesh - Heavy Duty has 6 inch connections withThis is a Maytronics Black Impeller with screw which is used on various Dolphin pool cleaners. The Dolphin models include DX6, Deluxe 4, Supreme M4 M5, Nautilus, DLX5, Edge, Spectra Light Premier, Quest, Wave 65 75 80, Wave 90, Apollo Plus, Deluxe 5 Trevi, M400, M500, C3, Apollo Windo, Nautilus 115V, Nautilus CC, Nautilus CC Plus, and Triton Plus. It is also used on Pentair Prolwers 820 and 830.