Why Cement
Durable, inexpensive, holds large volumes. A 500-gallon cement tank costs less than a glass equivalent.
Smooth coated surface prevents injuries to fish fighting or spawning.
Construction
Poured concrete lined with smooth waterproof coating (epoxy, food-safe silicone).
Drainage outlet at the bottom for complete water exchange.
Breeding Routine
Pairs introduced after divider period (Rule #22). Spawning surfaces provided (tile, slate).
Fry remain with parents for initial weeks then moved to grow-out tanks.
Scale Advantages
One cement tank can produce 1000+ fry per year.
Multiple breeding pairs rotated through the facility. Total output: 10,000+ fry annually.