Mine holds the time fine. I kill the power while I change the bulbs and once I start it back up the program and time work fine.
Same here. No issues whatsoever with holding time.
Dropped mine to its final position, 9" above the waterline

Mine holds the time fine. I kill the power while I change the bulbs and once I start it back up the program and time work fine.
Hi could you further explain as you seem to contradict yourself.
Adding more light will increase growth, but on the same token you say switch off led, which will reduce light.
Also is t5 8" above a 30" deep tank pointless?
You have a truly beautiful reef envious.
Confused
With you on 3 and 4. I have the newer version so 2 is not an issue with the additional screw I guess. My lights been up and running 1 year now and I can confirm great growth with this light too. As you stated stability is key especially with SPS. Over how many years did you take those growth pictures? Beautiful tank. I'm sure you have to keep up with a lot of pruning as I do here.
What bulb combo do you currently run? I've came to the same conclusion relative to LED intensity during peak T5 intensity...nothing but trouble. I've set my LEDs extremely low during the peak T5's but I have them ramp up to 35%, mostly blues, when the T5's are off.
Some folks have had good success with LEDs only, such as some Radion users. I have considered experimenting with only one set of T5's on and cranking up the LEDs higher. Seems really difficult to dial in the LEDs without frying my corals.
My bad . . . I meant to add those pictures are from ReefBum. That's his tank under MH over 3 years. I use that as my favorite example of how growth should be for everyone.
Absolutely I agree!
And here's my latest bulb config . . .
Fauna Marin UltraRoyal Blue
ATI Blue Plus
ATI Aquablue Special
ATI Purple Plus
ATI Purple Plus
ATI Coral Plus
ATI Blue Plus
Fauna Marin Ultra Royal Blue
Thank you! I just finished reading through most of your tank build thread. It was very inspirational. Kind of OT but I'm struggling with cyano and other nuance algae growing on the rock in my 5+ year old SPS reef. I'm trying some of the NO3/PO4-X product that you use. Found out I had a $75 credit on my account at DFS I had no clue about! Lucky me!
Anyways, I'm giving that a shot to see if I can break up some of that algae (nothing long/filamentous, just junk algae encrusting the rock). Other issue I have is acropora colonies clustered together and blocking flow to areas of the tank, guess the solution is mass trimming, but you seem to sustain relatively large colonies!
When you swap bulbs, do you think you will keep this same combination? I'm guessing your color is very crisp white with this combination. Basically 50/50 white to blue. I noticed you swapped out your actinics.
I feel mine is almost too white, but nice and crisp. Do you think you need more white bulbs to get the results you're looking for, or just for aesthetic preference? This is what I'm currently running:
Blue+
Pure Actinic
Blue+
Coral+
LEDs
Coral+
Blue+
Pure Actinic
Blue+
P.S. What is the visual difference between Blue+ and the FM-URB?
These posts about the led are really interesting. I did mention earlier that my led stopped working and was off for 5 weeks. In that time I didn't really notice any difference. However I was battling cyano so may well have disturbed things there.
Anyway, I have massively cut back led now to a peak of 35% and have a mix of tubes
Red Sea actinic
Coral plus
Gieseman actinic
Gieseman pure actinic
Led
Gieseman pure actinic
Gieseman actinic
Coral plus
Gieseman actinic
My colours really are good and growth on some is really good, but growth on others is slow, I don't get this rapid basing out some get. Parameters are all good. I have had some upsets, alk dropped to 5 after tube came out.....I also had a rock fall at one end so had to slightly re scape, which meant 5 tubes of putty in a weekend.....
I might well try ati tubes again (although the results from the giesemann are really good colour.
And here's my latest bulb config . . .
Fauna Marin UltraRoyal Blue
ATI Blue Plus
ATI Aquablue Special
ATI Purple Plus
ATI Purple Plus
ATI Coral Plus
ATI Blue Plus
Fauna Marin Ultra Royal Blue
Which bulbs are on for longer duration?
So you have the outer 4 bulbs working longer. I had it the same way then switched to my middle 4 bulbs since most of my corals are in the center to back of the tank and felt that would give best coverage. Got to try your bulb combo. I currently use a combo of Red Sea Actinic, AT Blue Plus and Coral Plus for my long lighting combo and it definitely looks different from the LEDs when it transitions. Never seen the FM Ultra Blue. I have 2 unused KZ Super Blues which I think are probably close to the FMs. Will be swapping the Red Seas out for those soon.The blue bulbs turn on first and turn off last. I really like how the LEDs are a perfect color match for the ATI Blue Plus. Before they turn on in the morning it's just LED light at about 15% with only Royal Blue and Blue, and when the T5s turn on it's almost imperceptible. I really love how smooth the transition is from night to day to night with this fixture. I honestly believe it is one in many steps that makes a captive reef "healthy". It's not natural light, but it's a very natural cycle.
In my job as an airline pilot I recently started flying to Asia. I now go to Hong Kong, Tokyo, Shanghai, and Singapore. I have found that it is the hardest flying I have ever done because you are never able to adjust. One day you have 20 hours of sunlight and the next you have 20 hours of darkness, and when you try to sleep it's all wrong.
The point is I believe more now than ever before that life on Earth has adapted to rhythms and the closer you get your reef to stable rhythmic life the more it will flourish and in this regard the ATI Powermodule reigns supreme.
Just started running without LEDs when T5s on for the past 4 weeks or so. Before that was running LEDs at 45% max power all day with ramp up and down before and after T5s. Have not noticed much difference yet. But I do have an 8 bulb unit so it packs a punch. I did not use red LEDs and whites were very low.are you also turning your led's off during t5 lighting period? I cannot really do this as I am running only 4 tubes on 30" deep and 30" wide tank.
any thoughts?
Does anyone see a problem with running two 48" fixtures end to end but with the vent sides pointing towards each other? It would look cleaner but I am concerned the heat will not vent properly.
Right now I am planning to run the two fixtures end to end but one of the power cord end will be facing the other fixture's vent side.