am o problema cu un sanitar Hoplosternum thoracatum,care pluteste cu burta in sus,daca il ating fuge imediat,inoata spre fundul acvariului,dar imi pare ca nu se poate mentine in apa,parca ar fi un balon de aer si este imediat aruncat spre suprafata.stie cineva ce ar putea fi sau ce as putea face?
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