TROPICAL AQUARIUM FISHES FRESHWATER & MARINE

كتاب TROPICAL AQUARIUM FISHES FRESHWATER & MARINE
المؤلف: George Cust & Graham Cox

The common freshwater tropical fish is a hardy creature and on the whole adapts very well to the environmental changes to which it is subjected in the aquarium . This type of fish is kept by thousands of aquarists who have never measured the hardness or pH of the water in their fish tanks , but to keep the more delicate species or to breed the more difficult egg - layers the aquarist may have to modify the environmental conditions . A basic under- standing of water chemistry will help him to carry out these modifications successfully .