I have 4 neon tetras and an albino pleco in a 3 gal tank. I give the pleco an alge disk every few days (3-4) when the last one is gone. Now my tank's water has a green tint to it. The last time i changed water was one to two weeks ago. There is also a couple plants in the tank. I use a tap water stabilizer when i change the water and let it sit in the gallon jugs for a few minutes before putting it in the tank. I even have a black light for the tetras but haven't turned it on in a few days. The tank sits near my back sliding door but the curtain keeps most of the sun off the tank.
My beta sits in a dish by himself (no filter and does have two plants) right next to the 3gal tank and his water is clear. His water got changed the same time that the others did.
and side question- i got bulbs for plants from petco, one of the plants has grown so tall its leaves are sticking out of the tank now. How do I fix this?