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I have read that and it sounds like running them will increase nitrates if they are not cleaned on a consistent basis. Sounds like addressing the issue by cleaning pumps or adjusting the water levels should fix it. I will be cleaning my pumps today.

Great tips, thank you. I will definitely look into them.

Thanks a lot for your excellent help.

Thanks. I tested with a Refractometer and it is at 1.025. Does it still need to be increased?

Thank you, I just moved the gate down as indicated. I already have saltwater in the tank as there is live sand and rock. Also, skimmer neck has been raised a bit. My fingers are crossed. :)

Thanks so much! I really appreciate the info. Attached are the pictures. I will also remove and clean the three pumps (sides and skimmer).

Hello! I have my RSM 250 up and running and have noticed microbubbles in the water. I have read through several posts and tips, but the bubbles will not leave. The bubbles are being created by the stock skimmer and blown into the tank by pump 1. I have the black sponge above pump 1, but the...

Great, thanks. What condition is it in and how much would you want for it?

Hello, I am looking to buy a working RSM 250 rear water cooling fan unit. Please let me know if you have one for sale. Thanks!

Thanks everyone for our replies and information. I will order a new impeller and it should be good to go. I'll definitely post pics of my progress.

Great, thank you. I will begin looking around for a new impeller.

Also, would a Tunze 9004 skimmer work with the RSM 250?

Hello, I am new to this forum and the saltwater hobby. I recently purchased a 2 year old RSM 250 that is in great condition. I've completed the assembly process and have two questions. The larger pump on the left hand side has a fairly large crack on the impeller magnet. The pump works but is...