Diatoms return? Or not long enough?

duff0712

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Hello!

My tank has been running for about a month and a half now. I know it is still a young tank but since this is my first saltwater ever I am more alert to everything.

I had a diatom bloom after the first week and it lasted for another twoish and pretty much went away! There was still some remainder but I wasn't too worried about it. I left for a few days and had my gf care for the tank while I was gone (I showed her exactly how much to feed, which she wouldn't over feed and I did a waterchange before so she wouldn't have to). I got back today and there is quite a bit more diatoms then when I left. It doesn't have a bunch of bubbles so I wouldn't think it's cyano and there are a couple patches of green but most of it is a darker brown color. Nothing else has changed since ive been gone. Actually I had been feeding (blennies and a damsel) twice a day a week or two before and have cut back to once a day never having a problem before.

IMG_2204.JPG IMG_2205.JPG IMG_2206.JPG

My Params as of 4 days ago.
Ammonia: 0
Nitrite 0
Nitrate 0 (noticed a ton of scum coating the water surface, turned my surface skimmer back on once I got back)
Ph 8.0
Kh 8.5
Salinity 1.024
Calcium 435
Phosphate: not 100% sure but when looking at the seachem test it was super yellow. I'm assuming around .02 but I'll be honest I can't read that test well.
Idk with silicates

I feed my fish frozen (that I clean in a net then refreeze) once a day and I dose home cultured phyto once a day.

Top off with rodi water and I make fresh saltwater with rodi water and Red Sea coral pro. Waterchange once a week.

If you need any other information that can help identify whats going on please let me know! As much as bad news would suck, just knowing what could be causing it can help me fix it. Thanks



Also as a side note if anyone can help identify these guys for me I'd appreciate it.

Couple on my rocks. Hard exterior and purpleish.
IMG_2207.JPG IMG_2209.JPG

Bunch of these sticking on my tank walls. Showed up 2 weeks ago and they are exploding in numbers. Sorry for bad quality pic, what I could get real fast.
DUF_9676.jpg
 
Last edited:
Very bottom pic is a hydroid. Main diet is small plankton and particulate matter. Can kill fry if you ever get any. Also the other pic above I can't see well very blurry on my phone but is it a snail? Does it move? Could be stomatella snail if it moves and has very small shell. But can't tell wit pics provided
 
Very bottom pic is a hydroid. Main diet is small plankton and particulate matter. Can kill fry if you ever get any. Also the other pic above I can't see well very blurry on my phone but is it a snail? Does it move? Could be stomatella snail if it moves and has very small shell. But can't tell wit pics provided

For the Hydroids do you think cutting back my plankton feeding will be best for removal? Yeah sorry about the pictures, my phone sucks at taking pictures haha. I have never seen the purple things move once I notice them. I can only explain them as a volcano/crater combo. One side is a long tall volcano like thing and the bottom next to it is a small crater. I have seen something receding into the crater and haven't noticed much from the taller part, but I don't always look at them.

Also the Hydroids are currently SUPER SUPER small, it would be impossible for me to manually remove. What I've just read about is they are hard to get rid of.
 
Hello!

My tank has been running for about a month and a half now. I know it is still a young tank but since this is my first saltwater ever I am more alert to everything.

I had a diatom bloom after the first week and it lasted for another twoish and pretty much went away! There was still some remainder but I wasn't too worried about it. I left for a few days and had my gf care for the tank while I was gone (I showed her exactly how much to feed, which she wouldn't over feed and I did a waterchange before so she wouldn't have to). I got back today and there is quite a bit more diatoms then when I left. It doesn't have a bunch of bubbles so I wouldn't think it's cyano and there are a couple patches of green but most of it is a darker brown color. Nothing else has changed since ive been gone. Actually I had been feeding (blennies and a damsel) twice a day a week or two before and have cut back to once a day never having a problem before.

IMG_2204.JPG IMG_2205.JPG IMG_2206.JPG

My Params as of 4 days ago.
Ammonia: 0
Nitrite 0
Nitrate 0 (noticed a ton of scum coating the water surface, turned my surface skimmer back on once I got back)
Ph 8.0
Kh 8.5
Salinity 1.024
Calcium 435
Phosphate: not 100% sure but when looking at the seachem test it was super yellow. I'm assuming around .02 but I'll be honest I can't read that test well.
Idk with silicates

I feed my fish frozen (that I clean in a net then refreeze) once a day and I dose home cultured phyto once a day.

Top off with rodi water and I make fresh saltwater with rodi water and Red Sea coral pro. Waterchange once a week.

If you need any other information that can help identify whats going on please let me know! As much as bad news would suck, just knowing what could be causing it can help me fix it. Thanks



Also as a side note if anyone can help identify these guys for me I'd appreciate it.

Couple on my rocks. Hard exterior and purpleish.
IMG_2207.JPG IMG_2209.JPG

Bunch of these sticking on my tank walls. Showed up 2 weeks ago and they are exploding in numbers. Sorry for bad quality pic, what I could get real fast.
DUF_9676.jpg
hydroileft.jpg

Hydroids
Medusa Stage

Suitability: Watch Them! Can kill fry.

Diet: Small plankton and particulate matter.



hydroidright.jpg
 
For the Hydroids do you think cutting back my plankton feeding will be best for removal? Yeah sorry about the pictures, my phone sucks at taking pictures haha. I have never seen the purple things move once I notice them. I can only explain them as a volcano/crater combo. One side is a long tall volcano like thing and the bottom next to it is a small crater. I have seen something receding into the crater and haven't noticed much from the taller part, but I don't always look at them.

Also the Hydroids are currently SUPER SUPER small, it would be impossible for me to manually remove. What I've just read about is they are hard to get rid of.

They stay very small and only a danger if you are trying to raise fry. You can cut back on phytoplankton feeding but that also will cut back food for your ampipods and copepods. Overall they're harmless so you don't have to worry about them. Also a wrasse could eat them opportunity arose.
 

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