I went for a week on vacation with my dad and left my sister in charge of my 55g planted tank. Plants: Giant Vallisneria, Water Sprite, Hornwort. I came home and my tank was green. There was algae ALL over my glass tops. As for the vall, it's turning brown. I started with a little slip and it has grown amazingly up until now. Now that it's decaying in the water, the cycle has started and I'm having to change water every 1-2 days because the decaying plant is causing it to cloud up. Any suggestions to revive the plants? Anyone had any good experiences with certain ferts?