This article is from the Aquaria: Good (and Bad) First Fish; Breeding FAQ, by Dean Hougen and Elaine Thompson
Painted Glassfish are Glassfish - Chanda ranga which have been
"painted" with chemical dyes. This procedure adds a temporary bit of
unnatural color (which disappears with time) and stresses the fish,
causing them to be prone to diseases and parasites. This fish needs at
least 1 teaspoon of salt per gallon of aquarium water.
 
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