Yeah ! Culling sick fishes are like killing a cancer patient because they have diseases, why not give them some chance and let them survive until they die ? thats what i did to 1 of my rams. Culling of fishes is not encourage by me 
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Apistogramma Peixoto, Agassizi 'Rio Tefe Cacadola', Agassizi 'Tefe Bauna', Bitaenita 'Rio Copea', Diplotaenia 'Barcelos', Mendenzi 'Sao Gabriel', Gibbiceps 'OrangeFace' Opal, Hippolytae, Pauciquamis 'Negro' Uauspei Blukteil, uauspei Rokteil, Elizbethae 'Sao Gabriel', Sunrise, Trifiscata 'Rio Pinmental'
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