Mysterious Growth on Return Pump - HELP

SR_11/2022

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Hi all,

I am new to the Reefing Hobby and just stared my first set-up in November of 2022 with an old tank I used for freshwater (cleaned thoroughly). I do weekly water changes of around 15-25% but have never cleaned the chamber that houses my pump (including the pump) since staring the tank. I will list my water parameters bellow - I did however have to leave for two and a half weeks and all that was done to the tank is feed/empty skimmer. I did a 45% water change yesterday and the parameters are from right before.

Attached are photos of my issue... in person it looked way creepier. I took apart and cleaned the pump (as well as everything else) last night and could only find whatever that was in that one area. I have a plethora of issues but this one was the most concerning.

Just looking for an ID and how to prevent this, hopefully starting up a new tank "true" reef tank end of this summer.

IMG_0965.jpg

IMG_0964.jpg


Salinity: 1.025
Temperature: 78ºF
Alkilinity (KH): 4.1 = 8.9dKH (usually around 10)
Amonia: 0.15 - salifert : 0 - API (usually 0)
Nitrate: 0.2ppm
Phosphate: 13 = 0.040ppm
Calcium: 0.18 = 410ppm
Magnesium: 0.12 = 1320ppm

Tank Spec. : 32.5 Fluval Flex (upgraded everything possible)
Pre-trip tank photo - I didn't get one yesterday before the clean
IMG_0478.jpg


Thanks for your time,

Spenser
 

Rtaylor

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It’s just a sponge. Nothing to worry about and actually a good sign for your tank.
 

ReefBoost

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Reminds me of Stranger Things...keep an eye on it :grinning-face-with-smiling-eyes:
(But yeah that kind of looks like my return pump after not checking it/cleaning it for a bit lol)
 

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