fish gasping

Can Any Edible Fish Tolerate Ph 4.5? Young fish and immature stages of aquatic insects are extremely sensitive to pH levels. Fish cannot survive in waters below pH 4 and above pH 11 very long (see Figure 1). What fish can tolerate low pH? Lower pH Wide Range (6.0-8.0) Higher pH Rasboras (5.8-7.0) Barbs Blind