plants:
rod of water purification
description: these rods come in many and varied shapes and sizes. each of these wondrous small rods offers your tank the following bonuses:
+1 against nitrates/ammonia
+1 against algae out breaks
+1 to O2 levels available in the water column
special feature: 10 or more rods of water purification in your tank offer an overall +5 bonus for dazzling onlookers.