Uh Oh, water turned green over night.

[Skinnysloth]

Water was fine and clear before I went to sleep and when I woke this morning it is green. All the my fish and corals seem fine; although I still haven't seen my goby. I did a quick water test using the dip strips and got:

Nitrate 0-20ppm
Nitrite 0
Alk 180-300 ppm (10-16kh)
PH 7.8-8.4
temp 83-86 (Been like this for the past month or two due to the hot weather)

I'm going to test some of the above with my seachem kit along with phospates. Also going to test Ca and Mg with my salifert test.

I'm making water to do a large water change and am running carbon right now. From the looks of it, I probably had a huge algae bloom, but I'm unsure what caused it. If I can't find my goby alive that might have triggered it. Or maybe my clam spawned in the water last night?

Anyone ever experienced or heard about this happening overnight?

[Skinnysloth]

Ok, test update:

Seachem tests:
Phos 0-0.02 mg/L
Alk 3.5 meg/L (9.8 KH)
pH 8.1-8.2
Nitrite 0
Nitrate 1 mg/L
Ammonia 0

Salifert
Ca 450 ppm
Mg 1380 ppm

Still haven't seen my goby.

[Skinnysloth]

Found my goby alive. Of course my skimmer went nuts trying to pull all the gunk out and it was really stinky.

[jb61264]

do you have a sump with caluerpa in it?

[Skinnysloth]

Yes to the sump, but not using caulpera. I'm using chaeto as my macro algae.

[Sugar Magnolia]

Any halimeda in the tank or sump?

[Skinnysloth]

No halimeda either.

Livestock:
1 yellow tang
2 clowns
1 cardinal
1 goby
2 cleaner shrimps
12 hermit crabs
50 dwarf cerths snails
10 Narsius snails
10 Nerite snails
1 Turbo snail
1 teardrop maxima clam 5"
1 frogspawn with about 10 heads
1 bubble coral about 5-6 heads
1 colony of daisy polys
1 kenya tree
1 green monti cap (medium frag)
1 green slimer (small frag)
1 birds nest (small frag)
Various zoas with 20 total heads
1 acan with 2 heads

Chaeto in my external overflow box.

[Skinnysloth]

Also SG is 1.025 using a refractometer.

[stripevt]

dosing anything or dropped something it the tank?

[jasonrp104]

Are you sure it's the water and not a green film on the glass? Silicates caused me to have green glass for awhile. I'd scrape, water change and still would have green in a few hours.

[mapleredta]

Any sort of sponge in the tank? How about children? Any chance of little kids dumping something in the tank?

[Skinnysloth]

stripevt: I've been dosing alk and Ca and those tested within normal ranges.

jasonrp104: It's definitely the water because the stuff being pulled out by the skimmer is really green. Top down view the water is still green.

mapleredta: No, I did not drop any children into my tank :D We have no children in this household, just 4 cats. Maybe one of them decided to go swimming in the sump. :p
The only sponges that I have in my tank are the pineapple looking scypha sponge as seen on Melev's site http://www.melevsreef.com/id/sponge.html and these, primarily in my sump. Sorry for the bad picture, using my wife's camera phone.

http://i28.*******.com/n35d3o.jpg

[Im14abeer]

Do you dose phytoplankton? Phyto can reproduce rapidly when nitrates and light are in ready availability.

[Skinnysloth]

I do not dose phyto, but the water sure looked like a phyto population boom.

After a 30gallon water change, the water no long looks green, but still slightly milky.