Aquarium Wave Generator Project # 589-04A Presented By: Aaron Goodwin Mike Pyrkosz October 14, 2003

Water movement is one of the most important requirements for coral health 90 gallon tank shown

Water movement is important Most are sessile animals (attached to rocks) Moves food past them for capture Removes waste and allows respiration to occur Photosynthesis and calcification rates increase

Types of Corals Stony Ridged calcium skeleton Require high water flow

Types of Corals Soft Soft tissue surface Require low to medium flow

Customer Base Amateur Aquarists Pet Stores Public Aquariums Marine Biologists Currently 7 million saltwater fish as pets in the U.S. according to the American Pet Product Manufactures Association

Customer Requirements Surveys placed on internet forums used by reef aquarists Water tight Reliable Provide adequate water flow volume and velocity Mounted outside of aquarium Generate oscillating laminar flow Ability to disassemble for cleaning

Conceptual Design Process – Rejected Concepts – Oscillating Paddle Mounts inside aquarium Large Metal components prone to rust Moving components can fail

Conceptual Design Process – Rejected Concepts – Oscillating Output Mounts on aquarium lip Moving parts prone to fail Random motion instead of oscillatory

Conceptual Design Process – Rejected Concepts – Controller for multiple powerheads Multiple powerheads inside of aquarium Cycles powerheads On\Off causing failure Excess heat transmitted into aquarium water

Rotational Diverting Valve Selected Design Rotational Diverting Valve Single inlet Alternating outlets Low geared motor drive Single pump allowed to run continuously

Plumbing Schematic Pump Outlet (2 Places) Pump Intake Diverting Valve Magnetic Drive Pump Diverting Valve Pump Intake

Expected Performance Water Tight Primary determinant of useful life All pipe connections will be NPT Valve driveshaft seal (o’rings) Targeted useful life to be 2-5 years

Expected Performance Make It Adjustable Different types of corals require different types of motion Different users will have tanks of varying shapes and sizes Flow output/direction and wave frequency all need to be adjustable to accommodate different customer needs

Expected Performance Easy Installation User should be able to add device to existing set-up with little difficulty Device should be small and non-obtrusive Device should require little in-tank space Targeted average set-up time 2-6 hours

Benchmark SCWD- Switching Current Wave Device Popular product among most aquarists Usually priced around $30-$40 Flow alternates by gear mechanism driven by inlet flow rate.

SCWD In Operation

Proposed Product vs. Benchmark Can be disassembled for cleaning Larger passages allow for debris to pass through Rotational speed of valve is adjustable Can adapt to different sizes Longer expected life No disassembly for cleaning Gearing is more sensitive to debris Rotational speed is function of flow rate Limited to one model with one size inlet/outlet hoses Limited useful life

Budget Actual expense costs : $415.00 Hypothetical Personnel costs : $22,500.00 Capital costs : $88,000.00 Direct costs : $22,915.00 Indirect costs : $7,561.95 Final total hypothetical budget: $141,391.95

Project Timing Test prototype constructed by January 30, 2004 Testing completed by February 13, 2004 Product revisions completed by March 15, 2004 Production / Public release on May 10, 2004

Questions?