_:n35bb42f0ebf24172a8178ee76ce59453xb54
<http://schema.org/description>
"Add 4 more dosing heads to your GHL 2.1 Doser!&#038;#13; If you need more dosing pump heads the GHL 2.1 Doser Slave is the perfect addition. It will connect to any GHL 2 SA, 2.1 SA, or ProfiLux 4 with a PAB cable (purchased separately). The 2.1 slave unit can be operated just like the master pumps with&#038;hellip;"
<https://aquarium.bulkreefsupply.com/reefing/Dosing-Head>