a tank crash means that a poison is released in the tank, killing the inhabitants or when there is a drastic change in water parameters and cause massive dieoff. the culprits for these crashes are usually sea apples, anemones, box fish, etc.
yes, fire gobies might be aggresive towards the same species but there might be exceptions.
one rule i stay to is never to trust any LFS. livestock there might seem peaceful because the fishes are under stress and do not show their true colours. it is better to read up before you buy anything.
hi guys,
for those who DIY your own skimmer, where do you actually order or buy those transparent plastic tubes? and also estimate the price for 1/2 feet length.
a million
i also bought one (too late to refund now)
i used a speaker magnet and one sweep can remove so much iron like scooping up sand. lucky i threw it all away