I have made too many mistakes to list them all in my 18 years in the hobby, and a special one from way before. Some highlights then.
1. Bright, light blue gravel. I still shudder.
2. 2 angelfish in a 10g.
3. Plecos
4. Non-aquatic plants. I still buy them, but only when I want a nice hardy houseplant.
5. Under-gravel filters.
6. The bubbling diver (I think everybody makes that one). Still want to put him in a dense field of glosso.
7. Keeping bettas in smaller tanks than 2.5g
8. Not changing water often enough.
9. Keeping goldfish in a bowl, but cut me some slack, I was five. I did try and throw a pothos in to give the fish oxygen. Didn't know about chlorine though.
1. Bright, light blue gravel. I still shudder.
2. 2 angelfish in a 10g.
3. Plecos
4. Non-aquatic plants. I still buy them, but only when I want a nice hardy houseplant.
5. Under-gravel filters.
6. The bubbling diver (I think everybody makes that one). Still want to put him in a dense field of glosso.
7. Keeping bettas in smaller tanks than 2.5g
8. Not changing water often enough.
9. Keeping goldfish in a bowl, but cut me some slack, I was five. I did try and throw a pothos in to give the fish oxygen. Didn't know about chlorine though.