I got mine at 1/2-1in. Darn thing grows slow, bought same time as my festae and synspillum 6-8 months ago. 1 Red terror is at 6-7 and 2 synspillum is at 5-6. 2 Argentea is only 2.5-maybe 3 but nobody touches them. The smallest in the tank filled with 30 5-7in fish. Never seen a single nip on them.
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