Rena Air 100 Weak output

[extremenewb]

Hi, I've recently bought a 2nd hand air pump tho I think it will be my last one i buy 2nd hand. It is a rena air 100 and the amount of output for the 2nd hand one is significantly and a LOT WORSE than the one I bought 1st hand from the shops.

I was wondering if any1 knows what I can do to increase the output? (eg parts I can replace, etc)

 

[TCTFish]

The diaphram in the second hand one may be old and worn out. If that's the case, a simple Rena diaphram repair kit will fix that. First test to see if it's not the stone. Sometimes stones will clog and not allow air to come out from the pores. Then check the diaphram. Sometimes it's good to replace the little air filter too.