Tropical Fish Keeping - Aquarium fish care and resources

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Fish Frenzy 04-14-2007 07:13 AM

Odd things after water change - thread fins
I have found this kinda odd lately, so thought I would ask.

I have a 20g tank with 3 rainbow thread fins (2 female, 1 male). They always stay at the bottom of the tank and eat sinking food.

But when I clean the tank, I leave the hood light off for a bit after, it seems to make it less stressful for them and they come out of hiding much fast.

But then they swim right at the top of the water, eat off the surface, and it is just completely out of character of them. Also, the male will then go lay on the bottom. Right on the gravel! Until one of the girls come and nudge him and then he swims around normally again. Next, I see these cob web type things hanging off plants often now. Are they eggs?

So, is this a sign I should change the water more often (I do it every 5-6days). Or is this normal and ok?

Lupin 04-14-2007 07:20 AM

What are your water parameters? I have not observed this type of behavior when I had them.:squint:

How often and how much do you feed? I doubt they're eggs because threadfins do not lay eggs in blob forms but rather scatter them. I would suspect molds which means you have to lessen the food rations or increase your tank maintenance schedule to prevent molds from forming in your tank.

I think you ought to relax the stocking list in favor of your threadfins. Add more threadfins if they are the only occupants. A 20 gallons can fit 10 threadfins. They prefer their company and feel more secure at that. Note that males have a tendency to show off their dorsal fins against each other.

Fish Frenzy 04-14-2007 07:24 AM

Molds!!! But it appeared right after I cleaned it. And I even took that plant out and washed it (plastic plants). Gah. Now, I was late cleaning it this week because I ran out of conditioner and had no money to buy more...but still.

I feed them 3 times a day, tiny amounts of micro food.

I don't have my water junk because I don't have a testing kit.

Fish Frenzy 04-14-2007 08:05 AM
My fishes (the female might be the same fish I dunno)

Goop on plants (hard to get the camera to pick up!)

Goop out of tank on my hand.

Does that help?

Falina 04-14-2007 08:22 AM

i know you tried your best with the photos but its still really hard to see so ill just guess.

what i was thinking: when i do water changes, unless im really careful i always end up disturbing the gravel since i only gravel vac once a fortnight and water change each week, and wee bits of dirt and just general "goop" gets uprooted shall we say

is it possible that the flow of water going into the tank after water changes isnt just disturbing the gravel and causing bits of dirt to float up and get caught in amongst plants?

lovely fish btw :)

Fish Frenzy 04-14-2007 04:09 PM

Yea, I know they suck. It is hard to take pictures through glass.


Yea, I know what you mean. If I miss any bits (which I know I always do), it will float around for a bit. I fish out the big pieces with my net. But the gravel rarely looks dirty.

But yea, it may just be goop.

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