OOps I guess I missed your post, right let's take a look and answer as best I can.
Ive been running 9% for over a year with no issues have not had any cyano or dono events either a few questions if I may:
You mentioned that a sump location is not ideal for an Oxydator, any reason ?
They do work OK in the sump but IME better in the DT. I guess the reason being. depending on where located in the sump the peroxide is less effective probably due to it working first on the detritus and organics etc in the sump before it gets to the DT so by the time the water in the sump is pumped to the DT it has lost some of it's effectiveness to a point. Also as the water from the sump is usually returned near the surface rather than low down again the effectiveness may well be reduced as some of the O2 may be lost through the surface. When Oxydators are in the DT the O2 released is low down and seems to be better spread throughout the tank. All Oxydators are designed to fit on the bottom of the DT and even the pond version is designed to sit on the bottom I would guess for better distribution throughout the pond.
@LESI assume if a sump location was the only possibility then after the skimmer would be preferred ?
Ideally, I would say yes, however, given my smallish sump my Oxydators are just before my skimmer, not ideal but it is the only place I can fit them. They don't seem to affect the working of the skimmer as Oxydators have no effect on CO2 or the bubbles the skimmer produces it seems.
@LES Have you heard of any issues on systems that carbon dose (vodka etc) and use an Oxydator ?
None that I am aware of no.
@LESIn one post it was mentioned about "known" risks to "known" animals, can you elaborate ?
When I was experimenting with Oxydators including various combinations of % peroxide and numbers of catalysts I pushed the concentration till I got a negative reaction from something and first to react was a large H.magnifica anemone but that was using 17% peroxide and 2 catalysts if I recall correctly. Bare in mind as far as I am aware at the time nobody was using Oxydators in marine aquaria and along with a couple of friends we were exploring and pushing the limits. BTW the magnifica made a full recovery within a few hours after I removed the supper strength peroxide in the Oxydators. Mushrooms also started to curl up at the edges.
I have never gone more than 12% since and I use 9% peroxide and 2 catalysts in my 2 Oxydator As and rarely advise anybody to go beyond that strength and number of catalysts.
They say you have to fall off a motorbike before you know the limit of it and I have done that more than once in the past, lol
@LESOverall any risk of having 1ltr of 12% Peroxide in a large reef system, what's the worst case scenario ? I assume a vessel leak and all contents coming out, has anything similar happened and what was the result ?
I have never had an accidental spill with my model As as the small turn cap is very secure when in place with little chance of not putting it on properly. however, I know of a few people who failed to ensure the caps on their model Ds with the resulting peroxide leaked into the DT far too quickly. Obviously with an Oxydator being used in a system designed for a much less capacity than the system you are using it on higher % of peroxide can often be used and I would say 12% would be fine in many large systems depending on the circumstances with volume, stocking levels of the DT. The Oxydator W is similar to the model A in that the small locking cap fits very securely.
Sorry for so many questions
@LESI'll be back over to the UK soon and may get chance to get to Bury market !
Be sure to stock up on black and white puddings
OH! and Oxydators to take back to the US
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