John P.

I bought 500mL of Excel last night. Today was day 1 of the "experiment." Hugely unscientific, but why not.

I'm not ODing b/c I have a lot of animals in there, including shrimp.

We'll see.

baj

I just blasted 3x the amount in a 18g tank, 30ml instead of 10ml, fish are happy, plants are happy, algae are happy (not that I had a SL, but whatever was there remained), do you guys repeatedly OD to get results, like maybe 3x for a week or so?

Gomer

The effects I saw were not immediate but was noticable after about my 3rd overdose in a week. Cladophora was getting white "burned" ends (the bottom half survived since I stopped dosing, but the top half melted away. The BBA started to turn weird colors as if it was bleaching out.

pineapple

To get the algaecidal effect in a 30 US gallon aquarium I was dosing 15ml every day. Normally, I would dose 15ml after a water change of 50% and 5ml every day thereafter. If you see a demise in water quality, back off the dosing amount.

Andrew Cribb

Gomer

Am am doing 15ml every other day on my 30 righ now actually. I am on my 3rd dose and I am seeing all sorts of BBA turning red.

John P.

That much & the shrimp are okay, eh? Wow. Did you slowly work your way up to that level?

-Yesterday I dosed 11 mL in my 26-G
-Today I dosed 3 mL

I guess I'll try 11 mL tomorrow & will see what happens.

Gomer

Shrimp all seem ok.

Seachem recommends 5ml/10g at major water changes and 1ml/10g daily. This works out to 15ml and 3ml/day. Over a week, it is a total of 33ml. I dose a total of 45 over a week with 40-50% weekly water changes. Instead of hitting the algae with a 45cal followed by a pellet gun daily, I hit it 3 times a week with a 45cal.

I am out of excel now but will have more this time next week (big als order) and will continue the dosing and report back.

plantbrain

So your shrimp are fine and other fish as well?
Did you try this on that algae tank you entered??
I need some algae to work with and it'll be awhile before I have that chance.

I find it interesting and have an idea of the mode of action.
Regards,
Tom Barr

John P.

-Tuesday I dosed 11 mL in my 26-G
-Wednesday I dosed 3 mL
-Today (Thursday) I does 8 mL

One adult female (pregnant) Cherry Shrimp is barely clinging to life right now.* The rest of the shrimp (~30+) are perfectly fine & normal. 15 Cardinal Tetras, 3 Harlequin Rasboras, and 2 Otos all fine, too.

Could be a coincidence. I've always noted that the pregnant shrimp sometimes die for seemingly no reason. However, I've recently bumped up my CO2 levels and increased my fert dosage, too. So who knows.

* I have her out of the tank w/a water change & aeration. This is craziness!

Gomer

My shrimp are perfectly fine. I had some fish die due to something unrelated. An order of fish from AZ gardens coinciced with an outbreak of Saprolegnia (?). Last time I did excel dosing with a healthy fish tank, no casualties whatsoever.

This is done on the algae tank. The clado is much more resistant to the excel than the BBA (virtually of it in the tank is now a heu of red), but it is effected. Also need to monitor the staghorn that also is in there. I forgot to look for it (perhaps cause it was already effected and gone so I didn't notice it?_