koi ponds & aquariums

M10031B is a lab grade 1413 µS/cm conductivity solution standard prepared against a NIST traceable potassium chloride solution that allows you to recalibrate your conductivity meter or tester

Insert the new Seychelle pH2O filter

Potassium — supports fluid regulation and heart function

Pump Marvel Garden Hose Vacuum Pump | No Electricity | Drains Spas, Pools & Basements to 1/8" three-point calibration koi ponds & aquariumsPump Marvel The Garden Hose Powered Vacuum Pump That Drains Spas, Pools & Basements to 1 8" Pump Marvel is a true pump not a siphon. Powered entirely by your garden hose water pressure, it requires no electricity, no moving parts, and no priming. Every gallon of hose water that enters Pump Marvel draws up to 3 additional gallons from the vessel being drained and ejects 4 gallons out of the discharge hose draining 13 times faster than siphoning or