Is a uv sterilizer a waste of money to fight hair algae?
Hello. I have a 40g planted tank with a 20g sump (for added filtration), an aqua clear 110, pressurized Co2 and some small fish. It's been immaculate for 5 years now, but suddenly I have a bloom of brown hair algae that has attached to only one plant (on leaves) and on the drift wood. Recently I switched out my dual 65 watt compact fluorescent (one 10000k and one atinic) for what I was told was an equivilent led setup ((6500k/800ln/royal blue @450nm)*3). This is the only change I've made in five years. Well that and eliminated excel from my treatments. I figured that with the pressurized Co2 liquid carbon was unnecessary. I should mention that I've been lucky with this tank and my reef tank as I do water changes only once every couple of months. I just top off the tank from evaporation. I have about 25 or so fresh water clams which help with the nitrates, I think..
Anyway, long story short (too late I know), will a UV sterilizer help eliminate some of the algae attached to the fixed objects or does it only help with water born spores? Or am I just fishing (pardon the pun) for an easy way out? Many years ago I had the same problem and had to transfer the fish and trash everything else in the tank to get rid of the algae.
The local fish store said I can dose the tank with ordinary hydrogen peroxide, but I'm suspicious of the advice. One kid told me to dunk each affected object/plant directly in the peroxide rinse and put back. Another said to scrape the algae off without taking anything out of the tank.
I used to prune my tank once a month and donate the clippings to the store, but now my plant growth is a bit slow... anyone have any ideas?