I have both the reinforced flex (white spa hose) and the clear non reinforced on my tank. Oddly enough i have the reinforced on the overflow and the non reinforced on the return. Ahh i remember now, the reinforced can be a pain to work with in tight places, thats why i went with the clear stuff for the return. Almost two years running and no problems yet. I doubt that you are going to encounter enough presure to warrant any super duper reinforced space aged type hose. Plus the clear hose allowes you to monitor the alge build up in the line. Just be carefull not to make any crazy sharp bends cause it will kink over time if you do. Hpoe that helps.