Sorry I missed the 2 Fluvals. So, I would add that, if doing two Fluvals, it makes more sense, if possible, to have two of the same model. That way you can keep a couple of small parts like an impeller or whatever else tends to break the soonest in those particular models. I also keep spare gaskets for my Eheims.
Years back I bought a used 75 gal. that came with a Fluval canister. I could not exchange it fast enough for my first Eheim. I have to assume they are made better today, but I have no need ever to buy another canister as I am in the process of winding down everything and retiring from the hobby.
I pretty much refuse to buy anything made in China that would come into contact with my fish. I do not trust Chinese in this respect at all. But SunSun is a "cheaper" filter and cannot be expected to last as long as the better made brands. Moreover, the UV in it is a waste. It is too small and the flow rate of the filter is way too high for it. Most tanks have no need for UV. I have a 9w UV I use for special situations- (receiving wild fish just imported) and it is used in a 29 gal Q tank. It is barely adequate for that size tank.
Also- Amazon rates all the filters they sell as well as all the pet supplies. Here is how they rate the sunsun hw 5000: customer reviews come out at 3.5/5, nt great. And their Best Sellers Rank: #192,486 in Pet Supplies (
See Top 100 in Pet Supplies)
So folks think apparently thing there are 612 better filter choices than the SunSun- caveat emptor. Also this model is currently out of stock at Amazon. Fluval canisters aree rated much higher than sunsun on Amazon.
I want my filters to hold media not UV or heaters. They occupy space better used for media. Also, it is more of a Pita to replace such parts if they fail. My UV is and independent set-up. I much prefer using inline heaters with canisters. I use the Hydor inlines. I have 3 running, one for 19+ years.
I will add one last comment. This is the digital age and now many (if not all) canisters come with some form of digital controls etc. Not for me. I have noticed a trend to put digital into anything mechanical and what then tends to break is the digital. I am even a tad nervous with my digital heater controllers. I was still able to find a mechanical dishwasher about 8 years ago. It replaced one with a motherboard which had to be replaced 3 times in under 5 years. The current one has not missed a beat yet. It has buttons, a dial and a slider lock. The same applies to the washer and dryer. Nothing digital and still working after about a dozen years. I am not even sure one can find a current canister model that doesn't have digital included. *SIGH*