| Morning Kent. I tried something different- epoxy paste.
I cleaned the area around the bulkheads with a brillo pad and water. And did the same with the bulk heads. Once dried I applied the two step paste ( A & B type epoxy) as a monolithic application over the bulk head and onto the fiberglass. The manufacturer says it adheres to PVC and fiberglass and is approved for potable water. It set up hard in 15 minutes and has now dried over 12 hours. Awful smell! The finished look is pretty good and looks like a water proof sealing of the entire area from Bulk head opening to one inch onto the fiberglass? It is dark grey on the black walls, but one bulkhead is in the filter and the other is against a part of the wall where the aeration rises from.
I will try some goldfish for toxic reaction before moving any of my koi into it. Any idea about toxicity of these materials? I my be overly concerned but I had some problems with the fiberglass itself many years ago when I built this thing. The styrene was a problem for a while. I researched the ingredients in this product ( Duro industries epoxy paste cement) and it seems very toxic when mixed but inert when dry? JR |