Hey guys, i need your help. Newbie here. I was just wondering how to prevent the water in my tank from turning yellow.
why is it turning yellow anyways?
Is it because of the driftwood in it?

but i bought the driftwood from the shop. it came with the plants attached to it. Wouldnt it be "clean" and free of tannins by then?
Also, are the tannins harmful?
i also recently added dwarf puffers to the tank and ive heard that they produce quite a bit of ammonia.
could that be the reason?