I think the petco water and the nutri seawater are both overrated and expensive. I have seen incredible reef tanks that have been using salt mix not ocean water. Like B said, if you have a nano tank it's worth it because it's not expensive. However the majority of us have larger than 20 gallon tanks, it would cost an arm and a leg to constantly be using that. I have just seen way way to many successful thriving reef tanks with mixing salt to say this "ocean water" is the key to having a nice tank.
I agree they are expensive and I am staying with my Red Sea Coral Pro, but the reason I started this thread is to hear if anyone had a similar experience with Petco Ocean Water.
I love Red Sea Coral Pro! My levels stay great and my coral growth is very good! Weekly 5 gal water changes keep my Cal, Alk and Mag good without dosing.
+1
Growth and cost is what I strive for. This might be fine for a nano, but not for larger tanks.
Besides Petco used to have it's own salt brand. And when I got into the hobby I started using that salt.
I had nothing but issues with it and nearly quit the hobby. Thank goodness I switched over to just plain old supplemented I.O.
Petco Ocean Water is real ocean water in a box. The Petco salt is a synthetic salt mix. I tried the Petco Ocean water (because members were talking about it) and was surprised at the polyp extension after the water change. Anyway, I am staying with the salt I have trusted for years unless someone had an idea why the polyp extension was so different. The theories and answers are very interesting. Thank you everyone! This has got me so interested in what the difference between synthetic and real ocean water!