Likely it has a bigger profit margin than other products. Don't listen to pet store employees for the most part. There are always exceptions, but they are in it for the sales mostly.
I've used Prime for over...umm...20 yrs maybe? Back when I was doing saltwater reefs. It is cheap per dose because it takes 2 drops per gallon (but some look at just the bottle size and compare prices that way). As much as I've recommended their product, they should give me free bottles!
I've cycled tanks with just Prime. If they have it and for your own peace of mind, see if they have the Ammonia Alert too (made by Seachem, the maker of Prime).
If you test your water that has been treated with Prime, it will still say it has high ammonia, because the ammonia is STILL THERE, but in a non-toxic form. The good bacteria can consume it in that non-toxic form, but it doesn't hurt the fish. The Ammonia Alert will show zero when the ammonia is in the non-toxic form, so you know its not hurting the fish. My LFS sells them for $6 and they last a year or so. I've used them in my fry tanks since February with good results (catching a few spikes quickly before the fry are adversely affected).
And yes, do NOT change the filter pads. To do so, you are taking out the good bacteria you've established and starting your cycle over.
I've used Prime for over...umm...20 yrs maybe? Back when I was doing saltwater reefs. It is cheap per dose because it takes 2 drops per gallon (but some look at just the bottle size and compare prices that way). As much as I've recommended their product, they should give me free bottles!
I've cycled tanks with just Prime. If they have it and for your own peace of mind, see if they have the Ammonia Alert too (made by Seachem, the maker of Prime).
If you test your water that has been treated with Prime, it will still say it has high ammonia, because the ammonia is STILL THERE, but in a non-toxic form. The good bacteria can consume it in that non-toxic form, but it doesn't hurt the fish. The Ammonia Alert will show zero when the ammonia is in the non-toxic form, so you know its not hurting the fish. My LFS sells them for $6 and they last a year or so. I've used them in my fry tanks since February with good results (catching a few spikes quickly before the fry are adversely affected).
And yes, do NOT change the filter pads. To do so, you are taking out the good bacteria you've established and starting your cycle over.
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