RichNJ Posted July 24 Share Posted July 24 So what is the effect of 18-22gh hardness and 8.0ph on tetras, cardinal tetras specifically...but also corydoras. Does it do harm or just prevent them from breeding? Shorten lifespan? Link to comment Share on other sites More sharing options...
Tony s Posted July 24 Share Posted July 24 All depends on the species. Some will do okay and thrive. But more than likely fry won’t survive. Same with corys. Chances are, if it came from petsmart or petco it will survive just fine. Probably if it came from a local source as well. For that matter, the fish from dans fish are grown in hard alkaline water as well 1 Link to comment Share on other sites More sharing options...
HelplessNewbie Posted July 24 Share Posted July 24 I have tetras (serpae, red cherry, neon, green neon) and cory (pygmy and cw097) doing well in in GH > 300ppm. These are in community tanks, not breeding. 1 1 Link to comment Share on other sites More sharing options...
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