i just did a complete chance on my dbt cage i changd the water gravel cleaned the fliter really good changed the parts. i put all the stuff back in hooked up the fliter just as it was before andnow it has been filtering the water and when the water comes out it formes like bubbles almost bubbles like soapy water does does anyone know what this is nd how to fix it..

the filter is a zoo med 501

thanks for your help
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Zero to 4 legs
1.0 Black Rough Neck Monitor
1.1 Bearded Dargon
1.0 Ball Python
1.0 dog(black lab)
R.I.P. Bailey gone but still in my heart