Works by sending a very thin sheet of water past the UV bulb. The very thin sheet of water makes sure the organisms in the water are properly exposed to the UV. The complete covering around the bulb makes sure that no eyes (human, fish or other pet) are exposed to the UV.
This is not a DIY project. This is not in any way the same as having a black light at the top of the tank.
they think highly of Rid Ich.
You can dose it this way:
Half dose in the AM.
Half dose in the PM.
This will still keep the medication in the therapeutic levels without the extreme peak that dosing once a day creates.
Do not use Amquel or Amquel Plus if you are using any dye based medication. (Read the label on the dechlor you are using).
Do not use UV with any medicine. UV can break down medicines.
I have seen only one post about the successful use or the organic Ich meds, and a lot of posts where these products seemed not to work. Lots of successful posts about Rid Ich.
Heat can kill Ich, if you can get the water hot enough. The trick is to get even the water at the bottom of the substrate (or at least as deep as the Ich organisms could fall into) that hot. The goal is to get the water over 86*F. To get the water in the substrate that hot you probably have to take the tank up to about 90*F. Many fish cannot take it that hot.
Water that hot holds less oxygen. If you try this make sure to increase the surface movement and circulation so the water is better oxygenated.
If you cannot get it that hot, then just keep the water at the upper end of the optimum range for the fish. Not too hot so the fish is still OK, not stressed from the heat. This will increase the fish metabolism so they can fight the Ich better, and increase the Ich metabolism so they go through their life cycle faster. Goal being the Ich die faster so you do not have to maintain the medicine in the tank any longer than you have to.
If you can maintain the temperature in the upper 70s then keep the medication in the tank for several days past the day you see the last Ich on the fish. A week is a good, safe time.
Vacuum the floor of the tank as much as you can as often as you can. Daily would be great. It does not have to be a large water change. You are removing the Ich that has fallen to the floor to breed, and improving the water parameters for the fish with every water change, even if it is just a small water change.