I have had many of these diatom filters from marineland.
Here’s my opinion and I believe everyone should listen to me because I’ve purchased probably 8 of these units with the same experience.
1. They are cheaply made. They will stop working after a few weeks, best case scenario it will just be an extremely weak flow, worst case it will just stop working.
2. They are annoying to clean after a while. At first you’ll be excited, but these things are a hassle to recharge after 2-3 days.
3. For something that you will use for parasite management, it’s important to use something reliable. These diatom filters will work for ich, but since you will most certainly not be using them long term (You’ll get super tired really quick), the benefits drop off very sharply.
4. They are way too strong for a 10 gallon tank. I’ve tried it and there’s no way around it, your fish will fly out of the tank.
Since your tank is a 10 gallon, if you really wanted to manage parasites, just quarantine them. It’s so easy in that size tank.
Or even better yet, just don’t QT at all! Most of the fish you can add in a 10 gallon is resistant to parasites. You really won’t have an outbreak and even if you do, treating them and deciding to QT is super easy for that size tank.
If you really want a tool to manage parasites, just get a UV sterilizer, only because the less human reliance with a unit, the more effective it is.