u/Comfortable-Low4781

Hi i am a beginner so don’t judge me I have on black moor and one gold ranchu fish 2 to 3 inches but chat gpt said the tank is small you need a big one any advice how big is required for these 2 fishes in a tank … i have this tank Can you please guide 30(L)*21.4(W)*21.1(H) cm is my tank size?