View Full Version : What are these?!

01-24-2016, 02:40 PM
Saw these in a fry tank. Thought they were dead plant debris first but apparently not. They don't seem to be bothering the fry, but they look creepy ��

One end is attached to the glass and the other end seems to be a lot of tiny tentacles collecting food.

http://i371.photobucket.com/albums/oo160/peathenster/Mobile%20Uploads/image_zpsa8icuwm5.jpeg (http://s371.photobucket.com/user/peathenster/media/Mobile%20Uploads/image_zpsa8icuwm5.jpeg.html)

Hydra? Bryozoans??

Apisto Jim
01-24-2016, 03:19 PM
Definitely hydra. They love baby brine shrimp.

01-24-2016, 03:31 PM
Thanks Jim. Fortunately the fry are big enough to not fall prey.

Just did some reading. Seems like certain snails will eat them. Does anybody have experiences with it?

01-24-2016, 04:30 PM
Had them. Safe Guard Goat de-wormer (fenbendazole) will kill them and not harm the fry. Very easy to do and if you are close to where I live I have a bunch of it left I hope to never have to use again. How large is the tank? Dosage is 2ml per 10 gal.

01-24-2016, 05:12 PM
It's a 10g. Unfortunately I'm in Athens :(

01-24-2016, 05:59 PM
Offer stands if you figure out how to get it.

01-24-2016, 09:13 PM
I've heard large cichlids and Gouramis eat them readily, might be worth a try.....

01-24-2016, 09:17 PM
Yup and they would also love the fry, lol.

01-24-2016, 09:21 PM
Lol of course move the fry first[emoji13]

01-24-2016, 09:22 PM
would any kind of snails eat them? Some posts online mentioned Apple snails and ramshorn snails.

01-24-2016, 11:13 PM
I have tried with apple snails. I don't know if they eat them or crush them when they waltz over the hydra but I noticed that they helped. Hydra was there prior to an apple snail moving over it and gone afterwards. But the apple snails did not get rid of all the hydra and I wanted them gone. Also the apple snails could not climb some of the plants as they are too heavy and the hydra there was save from the snails. I have not tried with ramshorns.

01-24-2016, 11:42 PM
Thanks for the info. The fry are too small to net but big enough to be safe from the hydra. I'll try to find some apple snails. Interesting problems :)

01-24-2016, 11:57 PM
There is a chance I might be making a trip to Commerce here in the near future to get some BNs. Looking at Google maps that is not too far from Athens. Maybe we could meet there or somewhere in between so I could give you some of the de-wormer. This is the stuff I am talking about.
http://www.ebay.com/itm/intervet-SAFE-GUARD-Dewormer-Goats-125-ml-4-2-oz-Fenbendazole-liquid-/321818185585?hash=item4aeddbcf71:g:UUYAAOSwgQ9Vt9c Q
I never had any hydra unless I had fry or baby shrimp then they just appeared out of nowhere. Since I have treated all my tanks with the goat de-wormer there has not been a hydra outbreak since. I love the stuff.

01-25-2016, 01:29 AM
Awesome. Pm incoming.

01-25-2016, 07:09 AM
Be careful.. they will transfer from tank to tank... nets, cleaning equipment, etc.

01-25-2016, 03:31 PM
Be careful.. they will transfer from tank to tank... nets, cleaning equipment, etc.

Yeah that's why I haven't taken the fry out and bleached the tank. Yikes!

03-09-2016, 01:07 PM
Take a look at this - http://www.sciencemag.org/news/2016/03/video-how-hydras-split-themselves-open-eat?utm_campaign=email-news-latest&et_rid=35386992&et_cid=327254

03-09-2016, 01:20 PM
That's a cool looking clip. Amazing what science can show us.