You're "Good to go" as in you're taking at LEAST enough to make a difference in your body. But you should follow the guidelines that I and a few others posted in several articles 5-6 is a maintanence dose (where the article said you wouldn't notice much difference 10-12 or up is disease fighting and you should notice a significant difference (though you should take your time to get there if you want to do that).
Here's a snippet from one of those articles:http://www.chlorellafactor.com/chlorella-spirulina-30.html
Chlorella
Disease-fighting dose: 10 grams / day
Maintenance dose: 5 grams / day
Upper limit: there is no upper limit, but introduce chlorella into your diet gradually and monitor your stools. Since chlorella can result in mild diarrhea in some persons, introduce it slowly. (Your body will adapt over a period of a few weeks, allowing you to take more.)
Once again, most people take far too little of these foods. I've seen people take two tiny tablets of chlorella -- about 300mg -- and declare they've "taken my chlorella for the day!" That's like eating one bite of broccoli and expecting to receive the full health benefits of broccoli.
In order to be effective, you've got to take the much larger doses mentioned above. If you buy chlorella in tiny tablets, as it is often sold, that means taking a handful of tablets with each meal. Here's a tip: don't count out the tablets every single time. Count them once so you know what five grams looks like. After that, just grab a handful and toss it down your throat. It doesn't matter if it's off by a few tablets. Remember: these aren't drugs. You don't have to be exact about it, just make sure you're getting at least the doses mentioned above.
There's no harm in taking more, of course. Aside from the health benefits I've described here, the main thing you'll notice is that your stools will turn green. This is an indication that you're getting a good dose of chlorella and spirulina into your diet. If your stools aren't green, you aren't taking enough
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Though a few people are at 3 gms and doing just fine. So you need to do what's right for your body.
Also those using it as a protein supplement can up their dose even more than 12, and taking even more is not a bad thing as it's a super food. So it's really up to you to judge for yourself. Some vegetarians have been known to take 20 gms or more as their sole source of protein. As chlorella is processed by your body from 80-90 percent (depending on how the cell wall is cracked and how you take it), regular protein like beef is only processed to 20 percent and the rest leaves in your #2! So Chlorella at a smaller dose can do significantly more than meat or even protein drinks. The article also talks about Spirulina which I am NOT taking because I am autoimmune. So those with autoimmune and other immune challenges should weigh it appropriately as some argue that it helps, and others that it makes the immune system over active (which could lead to attack instead of helping). I don't take the chance, and just avoid it. There is no argument w/ Chlorella however, so it can be taken by those w/ health problems.
Though there are other articles that say the opposite, I just wanted to post it as a reminder so that everyone can make informed decisions if deciding to take spirulina:
This is By Dr. Ray Sahelian M.D
http://www.raysahelian.com/spirulina.html
Apparently spirulina has the ability to stimulate the immune system which could be beneficial in some individuals, and potentially harmful in those who already have an overactive immune system or an autoimmune condition. Therefore, spirulina is not advised to be taken regularly for those who have lupus, autoimmune thyroiditis, pemphigus vulgaris, and other such conditions (auto/overactive)
HTH!
Just because it's natural doesn't mean there is not an upper limit. Too much of a good thing can be harmful, ie when people drink too much water and die from imbalancing their electrolytes.