an algae scrubber is an offset hinged tray, plastic mesh, algae, that fills with water, when the level reaches a certain point the tray dumps the water, the tray goes pivots back to the start position and starts all over again. the algae scrubber also has a light above it. an algae scrubber can double as a wavemaker if placed above the main tank. so, would the use of an algae scrubber be more beneficial than a wet/dry? could you replace the wet/dry with the algae scrubber?