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I've let my nitrate come up to 10, I'm letting my phos rise slowly to a target of .06 and I've lowered my par down a lot. I went from having my kessil lights peak at 75% for 4 hours to 30% for 4 hours and having my T5's on for 6. The par at the base of where my sticks are is now at around 200 using the seneye which jumps around alot so I'm not sure how accurate it is. I'm seeing a lot of improvement. That green and purple tip acro was starting to loose color at the base but after I lowered the intensity of my lights has almost fully recovered over a few days and I'm not seeing any tips with algae or any bleaching on any of the other frags yetI was having similar problems keeping sps. Everything I put in the tank would die after a few weeks but mine would start loosing skin at the tips, get brown algae, then eventually loose all it's skin and die. My parameters looked good and my par looked good on the seneye just like yours does. I eventually got frustrated and had someone look at my tank that really knows what they're doing with sps and they had me dial my LED's way down below what I thought was enough light and raise my nitrate up over what I thought was healthy for acros and so far my coral are doing a lot better. It's only been a few days but I'm seeing a lot of improvement.
Here you can kind of see the progress of a frag dying over a few weeks. During this time my levels were as follows
Temp 77.5
Salinity 1.025
pH 8.2
Nitrate 5ppm
Mag 1400
Ca 450
Alk 8.4
Po4 0.037
Par at coral base 300
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Well, all of the tissue sloughed off of that coral in the past 24 hours.
I sent off a sample to Triton yesterday, so it should be 3 weeks away.
I put anther coral in at 465 PAR. I'll be taking a picture of it daily to see its progression. It comes from a T5 system, near water level, but I have no clue what PAR it was under before.
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Would like to know your ALK as triton don't test for that.
Your CAL and MAG are a little on the high side but it depends on where your ALK sits.
Keep eye on K (potassium)
And as Salty already mentioned your La (lead) are flagged high.
I would use a detox from triton to get that removed or try to find the source, maybe a pump or pencil filling.
Every month a three day detox will keep it low but if you don't find the source you have to keep doing this till it will stop leaching in your water.
Your lithium is elevated, and that is probably from the salt mix. A great many people have elevated lithium, and I’ve seen some fresh artificial salt water samples that also had it. It is probably an impurity in one of the main ingredients of a salt mix, but it can also come from calcium and alkalinity additives, such as calcium chloride. At this level it does not concern me. It’s biological properties (such as a medication in people) seem to happen at much higher levels, and in many ways it is chemically similar to sodium that is present at 30,000 times higher concentration.
I think water changes is the only way to take it out.
I don't think you can draw any conclusions from the link where the guy did 60% water change & had that tin reading - it could have been 60% higher than that level to start with.(as much as i wouldn't trust that salt)
Tin's has also been known to come from newer piping
I think the tin is where your problem is
Correct, the high levels tin we see is from the pvc pipes.
@Randy Holmes-Farley had a article about this but he mentioned I believe it was never something to be worried about