No I am not using the shower only the galley sink.Do you have a leak from the head to the shower drain? Or are you using the shower?
This summer under the extreme heat I had it show up for the first time in my bilge. Looked like oil but on closer inspection it turned out to be a form of black algie . The color was actually a very very dark green. Cleaned disinfect the bilge so far it has not returned. And I finally fixed the reason my bilge was always damp. Shop vac works great on getting that last bit of bilge water that likes to trickle back down and out the bilge discharge hose.mescyc said:Thank you for the reply. I have cleaned the bilge with cleaner two times and I am still getting it. I have also made sure the drains are closed when I leave the boat for a couple of weeks at a time.
You make a good question.... But in my case I had cleaned the raw water strainer for one of the a/c units and then forgot to flush the bilge with fresh water and left some of the not so clear Clear Lake in the bilge and after about two weeks in the extreme Texas heat . This is what I got.shipwreck66 said:Just an idea. Could you be seeing a chemical reaction between some adhesives, varnish, sealant. I've seen polyurethane and silicone seal on top of each other dissolve into a black goo over time, especially in wet environment.