I bought a piece of driftwood with a plant in it on clearance at Petsmart. I removed the crappy plant but put the driftwood into my 29-gallon freshwater planted tank (it had come straight from the Petsmart tank and had been soaking there for a while, so I figured it would be okay in mine).
Recently, I noticed my diamond tetras looked different, discolored somehow. I decided to do a big water change, about 50%, and in doing so, I took out the driftwood and stored it in my son's Guppy
tank. I noticed the water I was removing had a yellow tint, but I didn't think much of it. For a week, things perked right back up. My tetras looked their shiny silvery selves. My Water Sprite
was growing better and so was the Wisteria
. However, my Siamese Algae Eaters had taken to hiding in a resin log. I read up on them and discovered they needed bogwood, which I figured was driftwood, so I put the driftwood back in.
Within 24 hours, the water was yellowish again, my diamond tetras look weird, and even the plants darkened up. I Googled, learned driftwood can leach tannins and change water color, but I could not find anything on whether it affects fish color or plants.
I am going to do another water change right now, but I would like to know if it's the driftwood which is affecting the plants and fish. It seems logical, but I doubt my own brain nowadays.