How fast does a cycle run? Here's an example.

Sk8r

Staff member
RC Mod
I moved my 54g tank, an established reef. I boarded my fish and corals at my friendly local fish store. A good thing.

Disaster attended the move...plumbing problems, moving problems, etc, etc, and I couldn't get my sump set up for 3 days, during which time my good live rock partially 'cooked', meaning: set in buckets, most of the life on it died and went to gross slime. It's not what I would have chosen: I lost all my featherdusters, bristleworms, all but one of my crabs and a cussed aiptasia anemone---if you wonder how tough those rotters are.

Saturday the 31st I set up and got the rock into clean salt water...no time to age the water, just-mixed raw saltwater that was at least fairly warm. [I use ro/di water, and had a heater going all night in a Brute trash can.] It was a gross, incredibly bad smelling mess. No time nor facilities to wash the 50 lbs of new sand: it went in and clouded up the water so you couldn't see the rock, but it's the bacteria I want to preserve. [The sand would be washed in ro/di water, and every drop of ro/di was going into that tank ASAP, because it takes a ferocious long time to produce 84g of ro/di [sump + tank.] I'd rather have dust than my rock partially out of water---and I filled my tank by letting the sump pump the water upstairs, a real step-saver, if you have the luxury to have the sump in the basement in the laundry room.

Sunday: I set up the skimmer and started it running: ordinarily I wouldn't do that on a new tank, I'd just let the chemistry act; but this tank smelled like a hot day at low tide, and I wanted some of the rot out.

By Monday you could sort of make out the rock pile I'd created. Not a bad piece of artwork. But I was pretty heartsick about losing all the animate life in those rocks. Then I spotted my sole surviving crab. I decided, well, he needs something better than rot to eat, and started in with the pinch-of-food a day regimen that you use to cycle a tank.

By Tuesday I'd found the darned aiptasia. Just one, but I'll be glad to get my peppermint shrimp back in there.

By Friday, I had some hair algae growth on a piece of coral [hair algae won't grow real well on corallined rock, so it won't grow too much in this tank.] Test readings still show no appreciable nitrate or nitrate, despite all the rot. This means no real breakdown, bacteria aren't up to snuff yet.

By Saturday I had a reddish brown film starting on various uncorallined surfaces: this is probably cyanobacteria, something you don't usually see in a brand new tank until about the second month: it's not desirable, but it beats dead white. And I set up my refugium---in my sump: about 20g of sand [more dust] and green growing cheatomorpha weed, with a light timed to the reverse cycle, off when the main tank is on: this helps stabilize temperature, for one thing, so you don't have all those heat-producing lights on at once. The cheato will sop up the phosphate that is the bane of corals, and that comes in with fishfood: it's also rife with life of its own, bacteria and small copepods that my fish will one day eat. They can get through the pump intact, because they're so small.

By Sunday, quite miraculously, the water was sparkling clear---this is because the bacteria are now numerous enough to bind the dust particles down and make them sink to the bottom.

Monday morning I test again and the nitrites and nitrates are showing color on the test strips. The tank is starting to process waste on its own, and the nitrate is the product. The rock is alive, and the sand has just a tiny thin layer of life---it hasn't spread through into lower layers yet. I'm going to consider cutting the skimmer off and cleaning it of the foul-smelling goop that's covered the column, and once I do that, I'll just let nature take its course in the tank until the cycle is complete. Then the skimmer will go back on and the cleaning crew will get to work.
 
Monday afternoon: I cleaned the skimmer of some really disgusting gunk compounded of rock flour [aragonite] and skimmate: I leave the smell to your imagination. Letting it run just a little longer to clean itself out.

The brown slime has coated about a third of the tank, along with some white mold on something, probably some of the fish food; the little hermit is still ambling about, and the hair algae on that one piece of dead coral is really starting to take off.

By Friday, if the readings do what I hope, like spike and then fall, I'll be able to do a little water change and buy a new cleaning crew and get them to work [snails and hermits: tank sand is too new yet for a conch]. I hope to be able to get my fish and corals back in maybe Wednesday after this coming Friday, but this may be entirely wishful thinking: the cleaning crew has to work and tests have to show 0,0,0 on the ammonia/nitrate/nitrite tests and the ph has to be ok. Plus to get the corals in I have to take a look at alkalinity and calcium levels. Nothing's on a time schedule now: it's all reliant on the tests. Regardless of the survival of the brave little hermit, it needs to be 0,0,0 before he gets other hermits to help him; and regardless how how impatient I get to see my fish and corals again, the chemistry AFTER the cleaning crew works has to be stable at 0,0,0 before I risk a fish.
 
Tuesday morning: the brown stuff is somewhat diminished from the rocks, trying to establish itself on the glass.
 
Bummer! Everything will work out I am sure. With your experience level I am sure it will work out faster than if some of us had the same problem. I am subscribed and will be watching to see how you do.
 
Well, the nitrates read .5 and the nitrate 20, if my scrambled brain has those items right. We're just in a genuine tank-cycle now, no hope of bettering the water until new sand, new water, and new [sob] cooked rock have run their course. The little hermit is still alive as of Tuesday afternoon, the trites and trates are just an immeasurable hair better than yesterday, and the water no longer smells bad. The brownish growth has gotten to the pond-algae stage: little things like threads adhering to the glass and rock. They sweep right off. But the crab is eating something, and the solitary patch of green algae thrives.

Ever thought that in starting a tank we recreate the beginning of the world?
We go from poisonous ammonia'ed sea to bacterial action to algaes invertebrates, filter feeders, photosynthetes, and corals, to fishes, eventually; but we need those worms and crawlers---can't skip that stage of life. Pretty soon our tank tries to present us an oxygen atmosphere as it develops cyanobacteria and tries to make stromatolites in our tanks, but, ingrate us, we keep using stuff to wipe it out. We just like those early-atmosphere nitrogen bubbles to rise without cease.
So, the brown is not appreciably worse, and the readings are a hair better. I know I'm over-optimistic about the return of fish and corals, but I might make the date with invertebrates. I'm getting to where I could use a few hardy snails, with that brown algae crud. Definitely not cyano: no red to it, and much too early for that prehistoric visitor to the tank. Just plain brown yuck.
 
Nitrate and nitrite [can't believe I nitrated twice in the post above] are both under .5 and 20 today, so I think we're on the downside of the cycle. I gave the union valve a shove to open up a bit more flow to the tank, and reined back when it began stirring up whirls of sand. But we're on the way, I think. It's Wednesday, and I could possibly go get a few hermits. Probably not. I think the test even at, say, .3 and 15, is still too high. I'll see how the tank looks when the lights come on, maybe re-test this afternoon. The little hermit is still fine, moving about the tank on his own business.
 
One correction on the original post... you never just have one aiptasia. You have either zero, or a lot. You just can't see the ones that haven't grown yet.

I myself don't go overboard controlling these pests, but control is the operative word... It's not practical to elliminate them.
 
What amazes me is that zero life survived the nuke ---except one lil' black hermit and that confounded aiptasia! The sheer folly, sirs, of attempting to eradicate aiptasia! They're the cockroaches of the marine world!

And, clearly, some bacteria that hitched over in the downflow box, which traveled with water in it; and some algae, which has now begun to fuzz up my rock. The brown slimaceous stuff is on the retreat in favor of real fuzz. Haven't tested this afternoon, but I imagine it's still trending down.
 
Wednesday evening: water is crystal clear, and fuzz is advancing as the brown crud fades. I'm sure we'll be getting the cleaning crew this Friday.
 
Thursday morning: clear water, and now the brown stain on the sand is definitely on the retreat, faded considerably. I don't think a brand new tank is as likely to develop that brown stuff...I think that's probably the result of the disaster to my rocks. Also I'm running Reeflux 12000k mh 250w, which has a bluer light than say, my former Ushio 10000k, and I'm told it isn't as friendly to green hair algae. Nonetheless, algae is now looking like morning-after stubble all over my rocks [not easy, since many of them are corallined] and should provide ample grazing for the cleanup crew I'm going to get tomorrow. I haven't run the water test today, but the look of the tank tells me a lot about the chemistry: I will be very surprised when I run the tests if my 'trates aren't headed zero-ward.
 
Thursday afternoon: continuing same trends, and tests read nearly 0 nitrate and a trace of nitrite. Haven't tested salinity or ph, but I'm on an autotopoff and I will test before I go to the lfs tomorrow to get the cleaning crew.
 
We moved on the 29th of March. Couldn't set the tank up until the 31st. Here we are coming up on one week since, after effectively 'cooking' my beautiful live rock --not my plan!--- and having to just dump in slime-dripping rock into raw saltwater that Saturday, the 31st. I spent that day and half the next looking for connections that worked, and it's all running smoothly now, new sand, new water, 'cooked' rock...and here we are 1 week later with good readings and heading for inverts. Fortunately my lfs is babysitting my corals and fish and one pep shrimp.
 
Is this ok for water changes and top off because of evaporation?

Is this ok for water changes and top off because of evaporation?

i just saw this water at my local supermarket and i wonder if is ok to use it in my FOWLR for water changes and top off purposes over my sump? appreciate your comments (of course thi is until i can afford my RO/DI filtration system !)


1495620411072254a.jpg


1495620411072254.jpg
 
mmm...your reverse osmosis is ro water, as in ro/di. That should be good. Carbon removes ammonia [shouldn't be there] and nitrate; your others will remove small parasites and bacteria.

Fasturtle, I just noticed your 'wet/dry builtin skimmer' and am a little puzzled. Granted equipment changes and mutates annually, but would that item possibly be a filter, instead of a skimmer? Wet/dry filters with bioballs are ok for FOWLRs, minding you keep the bioballs submerged and clear of detritus buildup, in good flow, and try not to use sponges; but if that is a filter, I would guess you don't actually have a skimmer, and I would recommend a skimmer as a pretty-soon purchase, if that is the case. I found that the remora/urchin sort was too small for my 54g, and upgraded to an EV120, which is doing very well for me. Just a point of comment.
 
Last edited:
Tested my own tank this morning: 0,0,0 nitrate, nitrite, ammonia---and a low alk at 6.4. So I've buffered. SHould get us back into marginally acceptable range. I'll start testing alk daily as the cleaning crew gets to work.

Today there's definitely hair algae attempting to grow on the glass. I had to throttle back the Iwaki, which was splashing water on the front of the tank and running over a bit. Also I don't want to send the little hermits tumbling. I haven't seen my little survivor hermit in 2 days, but in that rock pile, that doesn't mean he's not in there, just that he's not in one place as he has been. I'll have no trouble recognizing him among others: he has a half-white-half-black old cerith shell with a lime deposit. It's so good to see life starting up in the moonscape...
 
Well, I got the leftovers, for sure, since a guy setting up a huge tank had been there and collected 10 nerites and all the ceriths; I got some margaritas, a couple of nerites, couple of dim-brained trochus [the sort that can't right themselves] and a handful of my faves, strombus grazers, the little guys that spin spider silk and can extricate themselves from anything. Plus I got five scarlet hermits and five micro black hermits and some spare shells.

So I'm pretty near the end of this adventure. I'll be buffering alk to get up to 8.3 and starting to test calcium to get to 420 tomorrow...well, to head toward 420. I'll be retrieving my corals come next Wednesday, granted all goes well. And asking them to give me a few bristleworms with them; forgot that, today. I do want those guys at work once I have the corals. And I'll be retrieving my fish come Friday next, once the corals are in place. I did wave hello to my two little highfin gobies, who have taken up residence in a snail shell, but I didn't see any of the others but the Purple Tang I'm trading back to the lfs. My coral all looks good. Got some rock rubble for the refugium, and so far the cheato ball I got is doing well on a 12 hour alternate night cycle. So I'll be shutting down this thread as soon as the fish come back, but I hope this has been helpful to folk going through setup.
 
Back
Top