What kind of light for my goldfish?
My 4 goldfish are in a 125 gallon stock tank- put them there 2 summers ago when their outdoor pond sprung a leak. Thought this year would be the year I finally finished the new pond, but had other urgent home repair issues come up.
In the meantime-- my fish are losing color! The shubunkin has lost almost all his black spots and is now just a boring orange. One of the sarassa comets lost all her red and is now not exactly white, but more like transparent. The other mostly red sarassa is still red. The other sarassa is an offspring which is orange and hasn't yet developed a deep red like the parents.
I'm thinking it must be lack of good light for 2 yrs. I've pretty much ruled out disease. The filtration is good - charcoal + bio filter.
There is one 4 foot florescent grow-light tube above the tank and that's about it except for overhead light in the room. Algae grows somewhat but not the hornwort and other things I had in there.
Obviously not bright enough or right type of light, or... what? What kind of light do I need? Can y'all suggest something economical? Prefer something that fits in a standard 4' flouresence fixture. Thanks.