13" from lamp to water surface. 18" to sand bed.
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I think it’s better to think in ranges and not precise numbers. I think for young tanks you want to keep PO4 between .05 to .1ppm and about 10x that in NO3 (1-5ppm). If corals seem pale, then you can raise that range a little higher until you get deeper colors. As the tank matures, you can go slightly higher with both, but I like to keep PO4 close to .1ppm give or take .02 or so. NO3 can be 1-10ppm without issue and sometimes higher.I had a NOPOX forward siphon happen at the beginning of this month. I have slowly increased both.
What would be a safe level for each?
ok so 30" approximately from the lamp to the clam? BRS did a test at 16.5" from the water and Par measurements at 12" below the water. I am going to guestimate you are in the same range (closer to the water but further below the surface) At full power they were getting a Par measurement of around 170 in the center. At the 30% you are running I think it's a fair guess that your par at the clam is around 60-70. You mentioned your Zoa and Goni at the same level which typically do well starting around that same par. I did go slightly over 30% since your lamp is closer and more light will enter the water. Bottom line.. your clam is getting way too little light even if we estimate you might be around 100 par which I highly doubt.13" from lamp to water surface. 18" to sand bed.
Yes. Video link in the first post and lots of good discussion in the thread.@Shirak don you have that review video link? I think it'll benefit me to watch it to get an idea of the max output I should be targeting given their readings.
Can you raise the clam up? Trying to hit the clam at the bottom with enough par will toast pretty much everything else above it. If your Acro frags are looking good and showing some growth then the clam would probably be good in the same light range. You wouldn't have to do any adjustments except maybe bump the power up slowly over time to 50% or so.Okay so after watching the video I see what you're saying. I'll start by moving the lamp down in increments of 1" until I hit 7". Since moving down will increase intensity it shouldn't blast the corals.
After that I'll slowly ramp up the lamp to 100%. @ 5% each week? I already use the blue setting he recommends so good to have tested values to base off of.
At the same time I'll have to monitor phosphates and nitrates and adjust doses accordingly.
Do you think this is a good lighting plan? Any recommendations?
Can you raise the clam up? Trying to hit the clam at the bottom with enough par will toast pretty much everything else above it. If your Acro frags are looking good and showing some growth then the clam would probably be good in the same light range. You wouldn't have to do any adjustments except maybe bump the power up slowly over time to 50% or so.