Just read your thread top to bottom sir. Very interesting stuff. You're super determined and don't give up and I applaude you! But if I may, it seems you keep cycling the same problems with tank nutrients. Part of it is tinkering for sure. Algae issues I'd definitely agree you found your sources, old bulbs, red and green LEDs and over feeding corals coupled with a poorly working skimmer. Here is what I'm seeing right now. Copper could be an issue so definitely run lots of extra carbon.The skimmer is probably now properly sized with the sump upgrade but I'd think you may still have room to add more fish. But that algae scrubber is too much for your current bioload in my opinion. If you had 15+ fish cruising around in there I'd say go for it. I know for sure once I get my 40 breeder up I'll have 7+ fish in that and it will be sps dominated. Its always a balancing act with import/export with any system. Only way I'd bring that srubber back online is if I saw another algae outbreak. 2 thoughts, scrap the mirror/ take the scrubber offline and keep your feeding and previous care regimen. So far the best I've seen any of your skimmers working is that mud it was pulling out of that nasty yellow water you tested it on. I love to tinker and I feel your pain when that itch happens but brother you dip your hands in the tank too much so to speak. My last tank was so rock solid I did skimmer cup cleans every 5 days, glass cleaning every 4 days, every other week full water testing and once a month water changes. It was basically set it and forget it.
I know how it is Wally, take a look at my build of you get a chance (SPS section). I love being involved with my tank, intimate, trying to improve, always fixing things, cleaning none stop. I also want to buy every bottle of stuff to improve something or faster growth. You are obviously intelligent and energetic especially for what you have the passion for. I spend hours everyday with my tank and reading/researching. You are your own worst enemy.
A coral tank needs surprisingly few thing in order to THRIVE. Strong appropriate light, flow, skimming, husbandry/equipment upkeep, ALK, Cal, Mag, and regular water changes. Beyond feeding your fish there is little that you need to have colorful, healthy, growing happy coral. I know you had some problems and your reactions are logical however you seem to take them to far sometimes lol. You make good choices but if you would just take a step back before acting you might see that the problem isn't so bad. If nutrients are too low, you would see that it's not a big problem. Just not ideal and that adding a feeding here and there might fix it.
Stability and patience are the real details that separate an tank that is living from one that is thriving.
I have had every problem you could think of in the last year. I have beat every single one. Crypto, AEFW, monti eating nudis, zero nutrients, high ALK, Low ALK, burnt corals, MOVING!, and more! You know what, I've lost more fish than corals. I've lost one fish during QT because it jumped out of a tiny crack. Lost a beautiful powder blue in QT because I added Selcon to some food, a layer covered the top of the water, I forgot to turn my air pump back on and he must have suffocated and got caught in my filter intake. Lost another fish in the move becaus jumped out of another crack in my screen because I didn't learn the first time. The only corals I have lost (so far) where tiny pieces gifted to me.
I can now say my fish and coral are great. I am battling aiptasia, and working on it. I could have nuked all my rock, covered everything in Aiptasia-X, or got a laser and fried them. I chose to step back and really evaluate the problem. First I reduced my feedings and stopped coral foods. Researched all possible fixes and chose to go natural. I bought some Aiptasia eating Nudis, and just got a Copper Band Butter fly fish. The other solutions could have altered my chemistry or left some of the aiptasia behind (they can regrow from a single cell supposedly) or just make matters worse some other way possibly.
I learned to QT everything, have all the right medications on hand and enough to treat it. Keep a QT/hospital tank ready at all times. Keep activated carbon/GFO/ ALK/Cal/Mag, lost of extra salt and enough to last weeks even months. Wide variety of the right foods for every fish's needs. I have a controller with alerts and battery backups. Check all my equipment regularly and clean my pumps. I have extra pumps and parts. I siphon detritus where I see it. Make and keep saltwater and RODI on hand and ready to go. Dips and frag plugs in case I come across some coral I want to buy.
I learned a lot since my first reef tank, most importantly I learned what I really need and what I don't. I don't need every additive on the market and what I do have has a very specific need that it must fill. I don't have anything I don't know if it works or not. Also learned that stability is the single most important thing, THE MOST IMPORTANT thing. A controller helps with that sure but it's mostly about NOT experimenting and NOT trying and NOT guessing. I don't try to fix things that aren't broke. I also use a "gang tackle" approach. Instead of trying to fix a problem with one thing and possibly over/under doing it I try to do many things at the same time without over doing any one thing. When my nutrients where really low I could have tried an AA supplement or potassium nitrate as a quick fix. I don't want to have to keep adding and buying bottles of stuff just to make my system work. I decided instead to feed a little extra, add more fish, and keep my tank a little more dirty. But I didn't got out and buy 10 fish, dump huge amounts of food, or neglect my tank cleaning. It took time and I had to wait for fish in QT but I didn't have a nutrient spike, cyano bloom, have to stop dosing because I ran out and couldn't get more bottles for several days because they where out. I have a few more aiptasia but had those before.
You will get there, focus on the right things and take it slow.
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