Results 1 to 9 of 9
10-16-2012, 11:06 PM #1
brown algae on few month old tank
On my 30 gallon tank I have noticed some brown algae growing on the glass and the live plants.
What is causing this? I've seen mixed reviews on how to stop it and get rid of it...
Some people say to leave the light on longer.. Some say turn it off sooner...
I know I didn't have this problem until my hood light stopped working and I was wanting on a new one to show up in the mail cause petco or petsmart didn't have my size....
10-16-2012, 11:34 PM #2
If a new aquarium and it is diatoms, just wipe off as it grows - will clear up in a few weeks/month or so. If true algae, than lights on too long or an nutrient imbalance (if using ferts) or too much waste food or high nitrates all can be issues.
10-16-2012, 11:36 PM #3
0Originally Posted by Cermet
Here's my reading I just took from the tank.
I did wipe it off the tank but it's on almost every live plant in the tank.
10-16-2012, 11:38 PM #4
Light duration is determined by the plant type and light intenisty but in gerenal, 6 hours to 8 hours.
Your nitrates are far, far too high. It should be under 20 and ideally under 10 ppm. You need to clean off as much algae as possible, do a 90%+ water change and besure the nitrates don't climb above 20 ppm. You need to up your weekly water changes and/or cut back on food for the fish (may be an issue and maybe not.) Does sound like a cyanobacteria growth more than algae. Do you uses ferts for the plants? CO2 (injected or liquid) can kill cyanobacteria.
Last edited by Cermet; 10-16-2012 at 11:43 PM.
10-16-2012, 11:50 PM #5
0Originally Posted by Cermet
Thanks. The light is on for about 8 hours a day...
I just started a fert for the plants over the weekend. Had the algae before that though. It's a liquid fert.
I feed the fish in the morning and its not a lot. If they dont eat it all while I'm there I cut it back. They do a good job of cleaning it up and the snail gets what they dont.
I'll be sure to do a 90% water change!
10-17-2012, 12:11 AM #6
10-17-2012, 12:13 AM #7
I cleaned the gravel out sat. And I did about a 20% water change over the weekend also.
10-17-2012, 01:42 AM #8
Ok, just got done with a 90% water change... The N03 is now down to about I say 25. It's about in the middle of 20 and 30.
10-17-2012, 11:09 AM #9
When you clean the filter media, rinse in dechlorinated water only (use waste tank water.) Lady Hobbs is correct - the filter media can create massive nitrates. Water changes, long term, are the key to a healthy aquarium.
Be very careful with liquid ferts - if you have algae, these can feed them. Use only what the plants need. Under fert and watch for algae growth - if it reduces the algae as the plants do better, maybe raise it some.
While 8 hours is max light duration, this assumes the lights are the correct color temperature and intensity (watts per gal and correct for plant type.) Old bulbs lose their intensity. If the lights are not designed for plants, algae will get the upper hand.
Forgot to ask - does your water supply have high level nitrates? If so, this is an import issue.
I hate algae and it can be a battle - get those nitrates down and have the correct color temperature, be careful with ferts (borad spectrum ones can be an issue) and large water changes weekly all will help fight that monster. Best of luck!
Last edited by Cermet; 10-17-2012 at 11:11 AM.