Honcho
Aquarium Advice Apprentice
Just outta curiosity really. Ive noticed that most, if not all aquarium tanks ive ever seen don't have visible water lines due to the wood/plastic lid. I was wondering how high up you can, or should, fill a tank safely. My current tank is a 30gal tank with a pine lid. However the waterlinedoesn't reach the lid. There is still roughly another 5 1/2 inches of tank between the waterline and the top of the glass. (Plus another 5 inchs between the glass top and the lid). Is is wise to fill to the rim? I am really only enquiring as our floor is at a slight angle, making our tank look 'lop-sided'.