Tip on how to get a partner interested in your fish keeping hobby - try and find an angle that interests them. It may be they like gadgets so ask them to find a specific gadget for a specific fish keeping task or perhaps design a computer programme to help with feeding or breeding schedules etc. See if you can find one sort of tank that may interest them more than another - some like big fish, others like lots of smaller ones. Some like sparse tanks, others prefer heavily planted landscapes and set up a tank aimed at their preference. Ask for technical or artistic advice, depending on their interests. Sometimes it will just be that they have no interest in them whatever you do. In that case, enjoy them on your own - as long as they don't object to anything you spend, or do, with regards to the hobby. Nobody wants a partner spending money on fish when there are more important bills to be paid or things they could be doing together with it.