instant ocean or reef crystals?

[FitoPharmer]

Originally Posted by Myka

I used to feel the same way as Darryl and Tony about Instant Ocean, but having made the change back and forth between IO and H2Ocean 4 times I've noticed a significant change in my reef tanks each time. I won't use IO on my reefs anymore, I've decided IO is for FO tanks only. I haven't used RC on my reefs in many years, but every once in awhile I use it on my FO tanks when I can't get IO. Besides, H2Ocean is natural sea salt - there has to be a difference using natural sea salt as opposed to synthetic sea salt...there has to be.

What changes do you notice when switching between the two? I have been looking into trying H2Ocean but figured it was likely not worth the extra cost.

[Aquattro]

I've just gone backwards from Reefers Best to IO and don't notice any difference, other than having to up my Ca a bit. I'll stick with IO for a while, see how it works.

[Myka]

Originally Posted by FitoPharmer

What changes do you notice when switching between the two?

When I switch from H2Ocean to IO I don't notice any changes. I think this is because the changes happen slowly. After 4-6 I notice I start having troubles with cyano, sometimes even hair algae pops up. Test kits show extremely low nitrate ("zero" to 0.5 ppm) and phosphate (<0.08 ppm).

When I switch from IO to H2Ocean I notice an increase in SPS color within a couple weeks. Over a month or so the cyano recedes away, and polyp extension increases even though the test kits read the same as above.

I take lots of pics of my tank and I document changes and test readings, so I have lots of data to go on.

I used to be all for IO. In fact, if you do a search I used to say the same thing - buy IO, add a bit of calcium, mg, and potassium to it and you're golden. It's still cheaper than the others even after pre-dosing it. I've changed my mind now, just recently since I have now documented the same results I saw the first time I made the switch from IO to H2Ocean (in 2011 I think...going off memory right now).