I use Interceptor Spectrum, I get that from my vet, but have also got it from Australia. I have yet to use any yet. The Dr. G's SPS & LPS dip worked great. After talking with Dr. G he told me that the main ingredient is Milbemycin Oxime, which has the same effect. He does not recommend in tank use. But the exposure in the dip is significantly longer than a quick dip. But like I said it works great.