Existing plaster blocks are old-fashioned technology that may wreak havoc in your water quality. Tetra cutting edge new gel feeder blocks comprises no plaster and feed as much as 4 days. Blended with patented ProCare for optimal health.
Lets in fish to eat when hungry vs. plaster feeders that dissolve
Won’t pollute water or negatively effect water quality
Gel blocks is also left within the aquarium when regular feeding is resumed