Yes, you may want to read the thread. Corydoras will do fine with slower current as well, but when give more flow, like an airstone, they might ”dance”. Same with hillstream loaches. But without the dancing part... Fast flow for these fish is not necessary for their survival, its just a specific of their natural habitat IMO.I wouldn’t mix hillstream loach and glass cat glass cat like low flow same with corydoryas while hillstream loach like rapids