thank tou Al
well i think co2 is a considerable investment. because of this, if you were going to spend a single dime towards co2... it should be a permanent setup that should last the life of your hobby.
i feel like the paintball co2 although ideal in small cramped apartments and maybe your student residence... is still alot of money!! and more costly in the long run because in order to maintain 30ppm of co2 (typically 2-3 bps)...you are gonna blow through those disposable cylinders pretty fast.
therefoee if you got something now (ie DIY co2) its better than nothing. if you've got good growth, maybe not explosive but good healthy plants, why mess with it?
i would rather spend money on more plants or dry ferts!!
remember my 20L up until last week was an excel only tank.
in terms of ferts... i recommend investing in dry ferts NPK, Plantex CSM + boron etc.
i say this because the initial
investment (3X 1lb bags) could last you a year or more easily. plus you can control exactly what goes into your tank regardless of bioload.
I've tried Flourish and you're right, its not complete. You need to get Flourish Macro or Comprehensive etc. All of which i feel is expensive for bottled water with vitamins.
dry ferts all the way, and maybe some DIY osmocote caps for some root feeders.
hope this helps!
ps... i <3 bass! the run starts here before memorial day... backbay stalking for me soon