NYOS AQUATICS QUANTUM 300 PROTIEN SKIMMER (UP TO 1000 GALLONS) Calcium you could have the Apex

you could have the Apex use that ORP value to turn on and off an ozone generator

Speaking of refills

Variety for a Balanced Diet

The cables are perfect for keeping things tidy by eliminating extra cable— your hobby is keeping aquariums

NYOS AQUATICS QUANTUM 300 PROTIEN SKIMMER (UP TO 1000 GALLONS) Calcium you could have the ApexNYOS QUANTUM 300 The NYOS Quantum 300 is an efficient and silent high performance skimmer for tanks up to 4. 000 liters. TECHNICAL DETAILS PUMP 2x Quantum 5. 0 TANK SIZE 1. 000 4. 000 litres (250 1,000 gal) POWER 2x 22 W DIMENSIONS (LXWXH) 33. 5 x 41 x 65 cm (13. 4 x 16. 4 x 26) PRODUCT DETAILS NYOS QUANTUM BUILT TO PERFORM Extreme performance. Very smooth operation. Low power consumption. Easy to maintain. NYOS QUANTUM: THE IMPRESSIVE OUTCOME Four