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So after 3 months I've decided this hobby hates me and I'm beginning to hate this hobby. As much as I wanted to get into this, and it doesn't seem to matter how badly I wanted this aquarium, it's just not working out and to be honest, I feel like an fool for still having it set up.
It all started in March, when I bought the stuff and set it up. I filled it with water, crushed coral and 2 pounds of live rock along with 14 pounds of dry rock. I added a shrimp to start the cycle and let it rot, just as recommended. I did everything right, or so I thought, to set the foundation for a good tank. Ammonia came up, nitrites came up and nitrates came up. Ammonia and nitrites went down.... and nitrates well.. went off the charts. I bought another 14 pounds of dry rock and another couple pounds of live rock and into the tank. I waited. Patiently. Went through a mega pod explosion but they all disappeared in a week. Still waiting patiently. Adding no fish, just waiting. Diatoms started, nitrates 160ppm. Diatoms left, nitrates 160ppm. Water change... water change... water change... water change... water change... nitrates 160ppm. 50% water change... Nitrates 80ppm. 2 DAYS later.. nitrates 160ppm. Water change.... ADD SKIMMER.... water change... water change... nitrates 80ppm... water change... water change... water change... water change... nitrates 160ppm. patience gone... 50% water change... bought 5 crabs. nitrates 80ppm... 2 days later... nitrates 160ppm... WATER CHANGE... WATER CHANGE START DOSING "Instant Ocean Natural Nitrate Reducer" water change water change water change........ nitrates.... 160ppm....
I was recommended to dose vinegar but I never started doing it because I wasn't sure how much vinegar to start putting in there.
I know you will ask so here goes:
30gallong tank standard 17w t8 flouresent bulb
30 pounds LR
Crushed Coral (I have some sand here but I've been waiting til my nitrates come down to swap it for fear of making things worse)
Ammonia 0
Nitrites 0
Nitrates 160
Temp 79
Salinity 1.024
Maxijet 400 circulation pump
Octopus Skimmer
HOB filter with blue media changed every 2-3 weeks
5 crabs (alive and well)
1 turbo snail (seems depressed)
Currently, diatoms are starting to spread... again.. but I think on rocks and areas that didn't grow them before. Some brown algae stuff growing on my equipment and I've just begun seeing different colored... "stuff" on the live rock. A small spot of bright green... small spot of yellow... small spot of black... dark green... purple... brown.. not much.. . just very small spots.
I don't know what else to do other than dosing the vinegar. .. My next course of action will probably be a sledge hammer
been there done all that.
Take all the advice you can.
Then let me tell you the dirty little secret.
All you had to do was partition your tank with 1/4" square plastic grid (egg crate) ($12 from building supply stores), add a couple of shop lights ($30 or so) with 6500k tubes (smaller tanks spiral pig tail type lights) pointing at the partition area, and add chaetomorphin macro algae (free to $10).
Your nitrates would be unmeasureable by now. Diatoms, cyano, ugly algae would die off by killing the top lights. And the system would be balanced and stable.
no need for live rock--landscape rocks will do.
no need for water changes.
just top off with untreated tap water.
You could have "cycled" the tank with a $2.00 male molly to get things going. Oh yea-cycling with macros means low to no ammonia and nitrIte spikes but a possible nitrate spike instead. Then when bacteria built up and consuming the ammonia, the macros start consuming nitrates so finally the nitrates drop down.
But all that is just my .02
I get it various places. Walmart, dollar general, supermarket
I hope this comes across ok. If I read this right and you are only upset by high nitrates you are way over reacting. Buy some fish and some softies and get going. You spirits will rise immediately. Getting everything perfect is unlikely because these forums and this hobby give you way too much some times. Quit wasting water and let your tank stabalize. You will hopefully be surprised at how well you will be doing and start having some fun. I've been through it all in four years and still feel like I don't have a clue some days because I read these forums.

Please show me a successful reef that has no rock, no sand, no other means of nutrient export other than cheato and is topped of with untreated tap water without water changes.

