1. Skimz Skimmer SM257 at $180, being oversize used only 46% pump capacity for 4x4x2 tank. 2. Skimz 1.2 variable pump at $30. 3. Kent Float valve $20. 4. Aqua Medic ORP controller $30. 5. 2x Weipor PH meter at $40 ($20 each), Good for monitoring from far with red led light particularly for Cal reactor displayed on cabinet. Interested, pls whatapp 9108 7233, collect place is Bukit Panjang. Sent from Singapore Reef Club mobile app