Aquarium need for abandoned fish

Hi there, my name is Andreas.. i was born and raised in cyprus.. unfortunately the situation with animals here even for a small island is unbelievable..but what the forget is animals without a voice. fortunately we have some strong volunteers here tackling the situation with cats and dogs and try to educate people for this.. but animals like fish don't stand a chance. i have rescued over 25 fis ..most of these are fancy goldfish that were going to be flashed down the toilet. i just need your help so i can house them properly..i currently have all of the in a 300 litres aquarium which is a small amount of water for so many fish.. but due to daily water changes we currently dodging illness.. please consider donating for my cause as its going to help me to give them a better quality of life.. every soul counts.. every living thing..