FOR CRYSTAL CLEAR AQUARIUMS 
550 OUTSIDE PLASTIC FILTER—8'%2 inches high—5S inches long—3% inches 
wide. Made from unbreakable plastic. Complete with intake and outlet stems, 
rubber ball starter, charcoal and glass wool. Price $5.50. 
550-A OUTSIDE PLASTIC FILTER—Same as 550 with the exception of the 
hanging strap. This model is equipped with two aluminum hangers easily bent 
to fit any aquarium frame. Complete with charcoal and glass wool. Price $5.50 
551 OUTSIDE PLASTIC FILTER—Junior size—6 inches high—5S inches wide— 
3% inches wide. Completely equipped for efficient filter cperation. Charcoal 
and glass wool included. Price $4.50. 
556 NARROW OUTSIDE PLASTIC FILTER—6 inches high, 5 inches wide, 2 
inches deep—Separate compartments for glass wool and charcoal. Complete 
with intake and outlet stems, rubber ball starter, charcoal and glass wool. 
Price $3.50. 
553 WIL-NES OUTSIDE FILTER—One piece molded plastic construction with 
removable partitions for easy cleaning. 7”’L., 6 H., 2" W. Even-flo airlift, 
siphon stems, and rubber ball starter. Price $4.00—Complete with charcoal and 
glass wool $4.50. 
554 SENIOR SLIM OUTSIDE FILTER—Clear lucite construction—designed to fit 
those narrow spaces. 1%" W x 7¥2"L x 6H. Filter, air lift, siphon stem, and 
rubber ball starter. Price $5.85. 
555 JUNIOR SLIM OUTSIDE FILTER—Lucite construction, a narrow filter for 
smaller tanks. 134° W x 5¥%2"'L x 6H. Filter with air lift, siphon stem, and 
rubber ball starter, charcoal and glass wool. Price $3.95. 
560 FILTER STEM SET for 550 and 550A or any 8” Outside Filter—Air Lift 
(Outlet Stem) and Siphon (Intake Stem. Per Set $1.50. 
560-A AIR LIFT STEM only—75c: 560-B SIPHON STEM only—75c. 
561 FILTER STEM SET for 551—554—555—556—may also be used for 553 or 
any 6" Outside Filter—Air Lift (Outlet Stem) and siphon (Intake Stem). $1.50 per 
set. 
561-A AIRLIFT STEM only—75c; 561-B SIPHON STEM only—75c. 
WILNESS EVEN-FLO AIRLIFT STEMS—for Wil-Nes Inside or Outside Filters. 
New type airlift features even flow of water to tank. 75¢ each. 
562-4 FILTER CHARCOAL—Pure animal bone charcoal—double activated- - 
non-floating. Can be washed and re-used. Per Pound 35c. 
562-B FIBER GLASS WOOL FOR FILTERS—per portion 25c: per pound $2.50. 
FILTERATION 
570 PLASTIC INSIDE FILTER—HALF ROUND SHAPE—Unbreakable plastic 
construction—4 inches high—4¥2 inches long—3¥% inches wide. Complete with 
stem, aluminum hangers, glass wool. Fits inside the aquarium; all you do 
is attach the intake stem to hose from air pump. Price $2.50. 
571 NARROW INSIDE PLASTIC FILTER—2 inches wide—3 inches long—4 
inches high—a small compact inside filter that operates efficiently on a mini- 
mum amount of air. Aluminum hanger, stem and glass wool. Price $1.75. 
572 SQUARE INSIDE LUCITE FILTER—3'2 inches high—2¥% inches square. 
Durable Lucite construction, aluminum hangers, stem and glass wool. Price $2.50. 
573 WIL-NES INSIDE MOLDED PLASTIC INSIDE FILTER—Filter is one piece 
molded plastic construction. Unique intake stem fitted to outside of filter 
causes a steady continuous flow of water through filter. 3¥2 inches square, 
fits in corner of aquarium. Complete with glass wool. Price $2.00. 
REPLACEMENT STEMS FOR INSIDE FILTERS 
Stem Set, to fit 570 Inside Filteti.cwssciaerptne nce 
Stem Set to fit 57) Inside Filterics.n. Gosh. ntcqaccs acca nutes alae tatie Lne era eee 
Stem Set to, fit.572. Inside. Pilteriuui. ois hig steer stccscmanneendshe unten ae een 
Wil-Nes: Even Flo Airlift fon 573 "Inside” Filter. 2 nue .75¢ 
For additional Filter Stems and Accessories see Page 19. 
28 Note: A filter will not operate without an air pump. 
