Is there such a thing as too much flow for fish?

[djryan2000]

I have a JBJ 45, so about 32 gallons of tank volume. I have a Korallia 1500 gph powerhead in the back left corner pointed at an angle to the front glass as well as a Jabao SLW-20 on the right side. I'm not sure exactly how many GPH this pump is running, but I have it turned up about 80%, and it's capable of ~2600 GPH. When I first calculated my tank turnover rate it seemed to be a little over 70x which I thought as acceptable as a lot of SPS tanks run that. Now that I accounted for the fact my display volume is not 45 gallons, but closer to 32, I realized I have over 100x turnover. The SPS corals are all happy and its allowed me to place them lower down in the tank so I'm not concerned about them, but I am wondering if this is okay for the fish?

I currently have a longnose hawk and a single clown, as I lost the male clown this week sparking my concern over the flow being too much. I don't see them being tossed around the tank but just want to be sure. I don't plan on keeping any fish that are weak swimmers. I plan on adding a couple of wrasses, a goby, maybe a chalk bass or two.

 

[Billdogg]

My 120DT has ~70-80x turnover from powerheads in the tank, another 900gph from the return pump. The fish all do just fine with it.

 

[Uncle99]

Sure, you can overdue flow.
Fish want to swim, not surf.
I quiet things down a bit at night for easy sleeping.
If they are fighting the current all the time, that’s to much.

 

[HuduVudu]

I have a JBJ 45, so about 32 gallons of tank volume. I have a Korallia 1500 gph powerhead in the back left corner pointed at an angle to the front glass as well as a Jabao SLW-20 on the right side. I'm not sure exactly how many GPH this pump is running, but I have it turned up about 80%, and it's capable of ~2600 GPH. When I first calculated my tank turnover rate it seemed to be a little over 70x which I thought as acceptable as a lot of SPS tanks run that. Now that I accounted for the fact my display volume is not 45 gallons, but closer to 32, I realized I have over 100x turnover. The SPS corals are all happy and its allowed me to place them lower down in the tank so I'm not concerned about them, but I am wondering if this is okay for the fish?

I currently have a longnose hawk and a single clown, as I lost the male clown this week sparking my concern over the flow being too much. I don't see them being tossed around the tank but just want to be sure. I don't plan on keeping any fish that are weak swimmers. I plan on adding a couple of wrasses, a goby, maybe a chalk bass or two.

My opinion is gas exchange not necessarily flow. High flow absolutely helps with gas exchange but like others have noted there can be an upper limit.