Tablespoon or so of H20 from the drugstore per gallon (regular stuff from the band-aid section) works great. Use for a few days in a row it should get you cleared right up, it dissapates fast so you will have to add it at least every other day, then drain your nutes and make new fresh ones with like half as much H20 in it along with some vitamin B1 and seaweed extract..superthrive is your best bet for those two and it has some other very yummy bioactive stuff plants simply love...use at like .5 ml or slightly more per gallon (a full teaspoon per 10 gallons) in hydro to really strengthen your plants and their root systems but be careful it is strong stuff. Advanced Nutrients "Jump Start" or Technaflora Root 66 is great too. As was said above, make sure to aerate you nutrients with an airstone..those big heavy blue ones work best that won't float up to the top, do get the biggest longest one you can fit in your resevoir and buy a good airpump for it not the cheap crappy $9.99 ones, go for the best you can afford as they are usually quieter and move alot more air, try to find black tubing for the feed into the res so it does'nt clog up with algae, run the air 24/7 in the nutes. Good luck! :thumbsup: