I do.
Let's brake it down tho as I could be wrong.
U are using the 1 inch sea swirls correct? I believe they can handle up to 2000 gph does that sound correct?
U are using the hammer head on it for both of them correct? So what's ur est gph for each sea swirl? Say 1000 for poops and giggles the penductors then multiply that by 5 to 10 times the flow so that's 5000 gph min in something rated for 2000.
I'm the beginning when the swirl is new u will not notice anything but as it wears in the o rings will start to go bad and the sea swirl will eventually break.
Now I'm saying what I just said there have been one or two people I have talked to on this form that say they do not have a problem with using a penductors on sea swirls.
But I have called sea swirl and asked them about it and they said the exact thing I just typed above and that they do not recommend it.
Sea swirls will last forever if used properly but if u look into the people that say they didn't last for them and it was a waste of money it's usually because they used penductors or they did not use the swirls the correct way.
Will ur way work yes it will and u will have amazing flow but for how long? A year two or three at the max? It's ur choice in the end and from someone who has both sea swirls and penductors I would recommend hookim up the penductors on ur return and let the sea swirls do their thing.
Also the penductors have to be about 3-4 inches below the water line or u will have an onslaught of micro bubbles. Looking at ur photos I do not believe they are low enough.
Hope I helped
Justin