Existing plaster blocks are GÇ£old schoolGÇ¥ technology that can wreak havoc on your water quality! TetraGÇÖs innovative new gel feeder blocks contain no plaster and feed up to fourteen days with the Tetra Vacation Tropical Slow Release Feeder. TetraGÇÖs feeders provide real nutrition to fish when they need it. Allows fish to eat when hungry vs. plaster feeders that dissolve Packed with TetraGÇÖs health enhancing ProCare ingredients Will not pollute water or negatively effect water quality Gel blocks may be left in the aquarium when regular feeding is resumed
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